diff --git a/packages/opencensus-core/package.json b/packages/opencensus-core/package.json
index 22d8fe0af..6c649e5e4 100644
--- a/packages/opencensus-core/package.json
+++ b/packages/opencensus-core/package.json
@@ -53,7 +53,7 @@
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   "devDependencies": {
     "@types/continuation-local-storage": "3.2.1",
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "@types/once": "1.4.0",
     "@types/semver": "7.3.7",
@@ -62,7 +62,7 @@
     "codecov": "3.8.3",
     "gts": "1.1.2",
     "intercept-stdout": "0.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "ts-mocha": "8.0.0",
     "ts-node": "8.10.2",
diff --git a/packages/opencensus-exporter-azure/package.json b/packages/opencensus-exporter-azure/package.json
index 3a884d542..d27530147 100644
--- a/packages/opencensus-exporter-azure/package.json
+++ b/packages/opencensus-exporter-azure/package.json
@@ -21,11 +21,11 @@
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   "devDependencies": {
     "@types/chai": "4.2.21",
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "chai": "4.3.4",
     "fs": "0.0.1-security",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "readline": "1.3.0",
     "sinon": "11.1.1",
diff --git a/packages/opencensus-exporter-instana/package.json b/packages/opencensus-exporter-instana/package.json
index f04ee28b0..2d679a46b 100644
--- a/packages/opencensus-exporter-instana/package.json
+++ b/packages/opencensus-exporter-instana/package.json
@@ -50,12 +50,12 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/nock": "10.0.3",
     "@types/node": "10.17.60",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nock": "10.0.6",
     "nyc": "15.1.0",
     "ts-mocha": "8.0.0",
diff --git a/packages/opencensus-exporter-jaeger/package.json b/packages/opencensus-exporter-jaeger/package.json
index 2594848bf..23c2c6768 100644
--- a/packages/opencensus-exporter-jaeger/package.json
+++ b/packages/opencensus-exporter-jaeger/package.json
@@ -49,12 +49,12 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/nock": "10.0.3",
     "@types/node": "10.17.60",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nock": "10.0.6",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
diff --git a/packages/opencensus-exporter-object/package.json b/packages/opencensus-exporter-object/package.json
index 19e611132..dc3d3ad9a 100644
--- a/packages/opencensus-exporter-object/package.json
+++ b/packages/opencensus-exporter-object/package.json
@@ -49,12 +49,12 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/nock": "10.0.3",
     "@types/node": "10.17.60",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "ts-mocha": "8.0.0",
     "ts-node": "8.10.2",
diff --git a/packages/opencensus-exporter-ocagent/package.json b/packages/opencensus-exporter-ocagent/package.json
index 3d644c990..6365821e9 100644
--- a/packages/opencensus-exporter-ocagent/package.json
+++ b/packages/opencensus-exporter-ocagent/package.json
@@ -49,13 +49,13 @@
     "ext": "ts"
   },
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "@types/uuid": "7.0.5",
     "codecov": "3.8.3",
     "google-proto-files": "2.4.0",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nodemon": "2.0.12",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
diff --git a/packages/opencensus-exporter-prometheus/package.json b/packages/opencensus-exporter-prometheus/package.json
index ef8329b03..be38dedf8 100644
--- a/packages/opencensus-exporter-prometheus/package.json
+++ b/packages/opencensus-exporter-prometheus/package.json
@@ -52,13 +52,13 @@
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     "@types/express": "4.17.13",
     "@types/express-serve-static-core": "4.17.24",
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "@types/serve-static": "1.13.10",
     "axios": "0.21.2",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "ts-mocha": "8.0.0",
     "ts-node": "8.10.2",
diff --git a/packages/opencensus-exporter-stackdriver/package.json b/packages/opencensus-exporter-stackdriver/package.json
index 5834c4194..f2263d362 100644
--- a/packages/opencensus-exporter-stackdriver/package.json
+++ b/packages/opencensus-exporter-stackdriver/package.json
@@ -52,12 +52,12 @@
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   "devDependencies": {
     "@types/continuation-local-storage": "3.2.2",
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/nock": "10.0.3",
     "@types/node": "12.20.16",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nock": "10.0.6",
     "nyc": "15.1.0",
     "ts-mocha": "8.0.0",
diff --git a/packages/opencensus-exporter-zipkin/package.json b/packages/opencensus-exporter-zipkin/package.json
index 901f347da..f01a1bcfe 100644
--- a/packages/opencensus-exporter-zipkin/package.json
+++ b/packages/opencensus-exporter-zipkin/package.json
@@ -49,12 +49,12 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/nock": "10.0.3",
     "@types/node": "10.17.60",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nock": "10.0.6",
     "nyc": "15.1.0",
     "ts-mocha": "8.0.0",
diff --git a/packages/opencensus-exporter-zpages/package.json b/packages/opencensus-exporter-zpages/package.json
index 9e64f1ff5..4a068ee1d 100644
--- a/packages/opencensus-exporter-zpages/package.json
+++ b/packages/opencensus-exporter-zpages/package.json
@@ -55,13 +55,13 @@
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     "@types/express-serve-static-core": "4.17.24",
     "@types/extend": "3.0.1",
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "@types/serve-static": "1.13.10",
     "axios": "0.21.1",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
     "ts-mocha": "8.0.0",
diff --git a/packages/opencensus-instrumentation-grpc/package.json b/packages/opencensus-instrumentation-grpc/package.json
index 9f6e93b1c..98cec97f1 100644
--- a/packages/opencensus-instrumentation-grpc/package.json
+++ b/packages/opencensus-instrumentation-grpc/package.json
@@ -51,12 +51,12 @@
   },
   "devDependencies": {
     "@types/lodash": "4.14.171",
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "@types/shimmer": "1.0.2",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "protobufjs": "6.11.2",
     "rimraf": "3.0.2",
diff --git a/packages/opencensus-instrumentation-http/package.json b/packages/opencensus-instrumentation-http/package.json
index f845169ca..6b3a8ff72 100644
--- a/packages/opencensus-instrumentation-http/package.json
+++ b/packages/opencensus-instrumentation-http/package.json
@@ -49,14 +49,14 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/nock": "10.0.3",
     "@types/node": "10.17.60",
     "@types/semver": "7.3.7",
     "@types/shimmer": "1.0.2",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nock": "10.0.6",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
diff --git a/packages/opencensus-instrumentation-http2/package.json b/packages/opencensus-instrumentation-http2/package.json
index 03fcc64ae..058c183d4 100644
--- a/packages/opencensus-instrumentation-http2/package.json
+++ b/packages/opencensus-instrumentation-http2/package.json
@@ -49,13 +49,13 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "@types/semver": "7.3.7",
     "@types/shimmer": "1.0.2",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
     "ts-mocha": "8.0.0",
diff --git a/packages/opencensus-instrumentation-https/package.json b/packages/opencensus-instrumentation-https/package.json
index dd0837089..a026041a7 100644
--- a/packages/opencensus-instrumentation-https/package.json
+++ b/packages/opencensus-instrumentation-https/package.json
@@ -49,14 +49,14 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
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     "@types/node": "10.17.60",
     "@types/semver": "7.3.7",
     "@types/shimmer": "1.0.2",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nock": "10.0.6",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
diff --git a/packages/opencensus-instrumentation-ioredis/package.json b/packages/opencensus-instrumentation-ioredis/package.json
index 7d30cdf85..9838ff39d 100644
--- a/packages/opencensus-instrumentation-ioredis/package.json
+++ b/packages/opencensus-instrumentation-ioredis/package.json
@@ -52,14 +52,14 @@
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   "devDependencies": {
     "@types/ioredis": "4.26.6",
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "@types/semver": "7.3.7",
     "@types/shimmer": "1.0.2",
     "codecov": "3.8.3",
     "gts": "1.1.2",
     "ioredis": "4.27.6",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
     "ts-mocha": "8.0.0",
diff --git a/packages/opencensus-instrumentation-mongodb/package.json b/packages/opencensus-instrumentation-mongodb/package.json
index ae2c7555b..dcbc8e653 100644
--- a/packages/opencensus-instrumentation-mongodb/package.json
+++ b/packages/opencensus-instrumentation-mongodb/package.json
@@ -49,13 +49,13 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/mongodb": "3.0.19",
     "@types/node": "10.17.60",
     "@types/shimmer": "1.0.2",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "mongodb": "3.1.10",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
diff --git a/packages/opencensus-instrumentation-redis/package.json b/packages/opencensus-instrumentation-redis/package.json
index 4bca13f84..1b146ea40 100644
--- a/packages/opencensus-instrumentation-redis/package.json
+++ b/packages/opencensus-instrumentation-redis/package.json
@@ -39,14 +39,14 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "@types/redis": "2.8.31",
     "@types/semver": "7.3.7",
     "@types/shimmer": "1.0.2",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "redis": "3.1.2",
     "rimraf": "3.0.2",
diff --git a/packages/opencensus-nodejs-base/package.json b/packages/opencensus-nodejs-base/package.json
index b0ce173b0..d04f74533 100644
--- a/packages/opencensus-nodejs-base/package.json
+++ b/packages/opencensus-nodejs-base/package.json
@@ -41,13 +41,13 @@
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   "devDependencies": {
     "@types/extend": "3.0.1",
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
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     "@types/shimmer": "1.0.2",
     "codecov": "3.8.3",
     "gts": "1.1.2",
     "intercept-stdout": "0.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "shimmer": "1.2.1",
     "ts-node": "8.10.2",
diff --git a/packages/opencensus-nodejs/package.json b/packages/opencensus-nodejs/package.json
index 7070e3b09..03ec55a6b 100644
--- a/packages/opencensus-nodejs/package.json
+++ b/packages/opencensus-nodejs/package.json
@@ -41,13 +41,13 @@
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   "devDependencies": {
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-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "@types/shimmer": "1.0.2",
     "codecov": "3.8.3",
     "gts": "1.1.2",
     "intercept-stdout": "0.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "shimmer": "1.2.1",
     "ts-node": "8.10.2",
diff --git a/packages/opencensus-propagation-b3/package.json b/packages/opencensus-propagation-b3/package.json
index 0a738ebc8..7e27cca41 100644
--- a/packages/opencensus-propagation-b3/package.json
+++ b/packages/opencensus-propagation-b3/package.json
@@ -49,12 +49,12 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "@types/uuid": "7.0.5",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
     "ts-mocha": "8.0.0",
diff --git a/packages/opencensus-propagation-binaryformat/package.json b/packages/opencensus-propagation-binaryformat/package.json
index c3963c2e7..5269446b2 100644
--- a/packages/opencensus-propagation-binaryformat/package.json
+++ b/packages/opencensus-propagation-binaryformat/package.json
@@ -49,11 +49,11 @@
     "access": "public"
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   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
     "ts-mocha": "8.0.0",
diff --git a/packages/opencensus-propagation-jaeger/package.json b/packages/opencensus-propagation-jaeger/package.json
index afd82d473..353dd6a40 100644
--- a/packages/opencensus-propagation-jaeger/package.json
+++ b/packages/opencensus-propagation-jaeger/package.json
@@ -48,12 +48,12 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
     "@types/node": "10.17.60",
     "@types/uuid": "7.0.5",
     "codecov": "3.8.3",
     "gts": "1.1.2",
-    "mocha": "7.2.0",
+    "mocha": "9.1.3",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
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diff --git a/packages/opencensus-propagation-stackdriver/package.json b/packages/opencensus-propagation-stackdriver/package.json
index 3f00baee0..6a91722e6 100644
--- a/packages/opencensus-propagation-stackdriver/package.json
+++ b/packages/opencensus-propagation-stackdriver/package.json
@@ -26,12 +26,12 @@
   "author": "OpenCensus Authors",
   "license": "Apache-2.0",
   "devDependencies": {
-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
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     "codecov": "3.8.3",
     "gts": "1.1.2",
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+    "mocha": "9.1.3",
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     "typescript": "3.9.10"
diff --git a/packages/opencensus-propagation-tracecontext/package.json b/packages/opencensus-propagation-tracecontext/package.json
index f506c4731..41213dc05 100644
--- a/packages/opencensus-propagation-tracecontext/package.json
+++ b/packages/opencensus-propagation-tracecontext/package.json
@@ -49,11 +49,11 @@
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-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
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+    "mocha": "9.1.3",
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diff --git a/packages/opencensus-resource-util/package.json b/packages/opencensus-resource-util/package.json
index 49390353f..5ec9ad953 100644
--- a/packages/opencensus-resource-util/package.json
+++ b/packages/opencensus-resource-util/package.json
@@ -49,12 +49,12 @@
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-    "@types/mocha": "8.2.3",
+    "@types/mocha": "9.0.0",
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     "codecov": "3.8.3",
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