diff --git a/deploy/stage/mpc1-stage/values-iris-mpc.yaml b/deploy/stage/mpc1-stage/values-iris-mpc.yaml
index 6b5286c8f..27926072c 100644
--- a/deploy/stage/mpc1-stage/values-iris-mpc.yaml
+++ b/deploy/stage/mpc1-stage/values-iris-mpc.yaml
@@ -70,3 +70,6 @@ env:
 
   - name: SMPC__INIT_DB_SIZE
     value: "10000"
+
+  - name: SMPC__MAX_BATCH_SIZE
+    value: "64"
diff --git a/deploy/stage/mpc2-stage/values-iris-mpc.yaml b/deploy/stage/mpc2-stage/values-iris-mpc.yaml
index 94aac2f26..bb4c64dd0 100644
--- a/deploy/stage/mpc2-stage/values-iris-mpc.yaml
+++ b/deploy/stage/mpc2-stage/values-iris-mpc.yaml
@@ -70,3 +70,6 @@ env:
 
   - name: SMPC__INIT_DB_SIZE
     value: "10000"
+
+  - name: SMPC__MAX_BATCH_SIZE
+    value: "64"
diff --git a/deploy/stage/mpc3-stage/values-iris-mpc.yaml b/deploy/stage/mpc3-stage/values-iris-mpc.yaml
index 28bb175d5..f38e50a39 100644
--- a/deploy/stage/mpc3-stage/values-iris-mpc.yaml
+++ b/deploy/stage/mpc3-stage/values-iris-mpc.yaml
@@ -70,3 +70,6 @@ env:
 
   - name: SMPC__INIT_DB_SIZE
     value: "10000"
+
+  - name: SMPC__MAX_BATCH_SIZE
+    value: "64"
diff --git a/deploy/stage/smpc0-stage-eu-north-1/values-iris-mpc.yaml b/deploy/stage/smpc0-stage-eu-north-1/values-iris-mpc.yaml
index e0ab3ac11..1e5327ca3 100644
--- a/deploy/stage/smpc0-stage-eu-north-1/values-iris-mpc.yaml
+++ b/deploy/stage/smpc0-stage-eu-north-1/values-iris-mpc.yaml
@@ -72,4 +72,7 @@ env:
     value: "true"
 
   - name: SMPC__INIT_DB_SIZE
-    value: "10000"
\ No newline at end of file
+    value: "10000"
+
+  - name: SMPC__MAX_BATCH_SIZE
+    value: "64"
diff --git a/deploy/stage/smpc1-stage-eu-north-1/values-iris-mpc.yaml b/deploy/stage/smpc1-stage-eu-north-1/values-iris-mpc.yaml
index 3fed89f1c..6d1f97892 100644
--- a/deploy/stage/smpc1-stage-eu-north-1/values-iris-mpc.yaml
+++ b/deploy/stage/smpc1-stage-eu-north-1/values-iris-mpc.yaml
@@ -73,3 +73,6 @@ env:
 
   - name: SMPC__INIT_DB_SIZE
     value: "10000"
+
+  - name: SMPC__MAX_BATCH_SIZE
+    value: "64"
diff --git a/deploy/stage/smpc2-stage-eu-north-1/values-iris-mpc.yaml b/deploy/stage/smpc2-stage-eu-north-1/values-iris-mpc.yaml
index e1cefdff7..44801e743 100644
--- a/deploy/stage/smpc2-stage-eu-north-1/values-iris-mpc.yaml
+++ b/deploy/stage/smpc2-stage-eu-north-1/values-iris-mpc.yaml
@@ -72,4 +72,7 @@ env:
     value: "true"
 
   - name: SMPC__INIT_DB_SIZE
-    value: "10000"
\ No newline at end of file
+    value: "10000"
+
+  - name: SMPC__MAX_BATCH_SIZE
+    value: "64"
diff --git a/iris-mpc-common/src/config/mod.rs b/iris-mpc-common/src/config/mod.rs
index f0c1b5d06..a05d6becd 100644
--- a/iris-mpc-common/src/config/mod.rs
+++ b/iris-mpc-common/src/config/mod.rs
@@ -55,7 +55,7 @@ pub struct Config {
     #[serde(default)]
     pub init_db_size: usize,
 
-    #[serde(default)]
+    #[serde(default = "default_max_batch_size")]
     pub max_batch_size: usize,
 }
 
@@ -63,6 +63,10 @@ fn default_processing_timeout_secs() -> u64 {
     60
 }
 
+fn default_max_batch_size() -> usize {
+    64
+}
+
 impl Config {
     pub fn load_config(prefix: &str) -> eyre::Result<Config> {
         let settings = config::Config::builder();