diff --git a/README.md b/README.md
index 8a960dd..89b1884 100644
--- a/README.md
+++ b/README.md
@@ -73,6 +73,9 @@ Raise an issue https://github.com/DannyCork/python-whois/issues/new
  * add support for returning the raw data from the whois command: flag include_raw_whois_text
  * add support for handling unsupported domains via whois raw text only: flag return_raw_text_for_unsupported_tld
 
+2023-01-18: sorrowless
+ * add an opportunity to specify maximum cache age
+
 ## Support
  * Python 3.x is supported.
  * Python 2.x IS NOT supported.
diff --git a/makeTestdataAll.sh b/makeTestdataAll.sh
index ce1673b..3c459ee 100755
--- a/makeTestdataAll.sh
+++ b/makeTestdataAll.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#! /usr/bin/env bash
 
 TMPDIR="./tmp" # the default work directory is a local tmp (exclude by .gitignore )
 
diff --git a/test.sh b/test.sh
index 0c89ecb..ac3132f 100755
--- a/test.sh
+++ b/test.sh
@@ -1,4 +1,4 @@
-#! /usr/bin/bash
+#! /usr/bin/env bash
 
 # signal whois module that we are testing, this reads data from testdata/<domain>/in
 prepPath()
@@ -22,7 +22,7 @@ testOneDomain()
     echo "testing: $domain"
     ./test2.py -d "$domain" >"$TestDataDir/$domain/test.out"
 
-    diff "$TestDataDir/$domain/output" "$TestDataDir/$domain/test.out" | 
+    diff "$TestDataDir/$domain/output" "$TestDataDir/$domain/test.out" |
     tee "$TestDataDir/$domain/diff.out"
 }
 
diff --git a/whois/_1_query.py b/whois/_1_query.py
index 6ec46bd..a3a9b06 100644
--- a/whois/_1_query.py
+++ b/whois/_1_query.py
@@ -41,6 +41,7 @@ def do_query(
     dl: List[str],
     force: bool = False,
     cache_file: Optional[str] = None,
+    cache_age: int = CACHE_MAX_AGE,
     slow_down: int = 0,
     ignore_returncode: bool = False,
     server: Optional[str] = None,
@@ -53,7 +54,7 @@ def do_query(
 
     # actually also whois uses cache, so if you really dont want to use cache
     # you should also pass the --force-lookup flag (on linux)
-    if force or k not in CACHE or CACHE[k][0] < time.time() - CACHE_MAX_AGE:
+    if force or k not in CACHE or CACHE[k][0] < time.time() - cache_age:
         # slow down before so we can force individual domains at a slower tempo
         if slow_down:
             time.sleep(slow_down)
diff --git a/whois/__init__.py b/whois/__init__.py
index 6a237ad..15e891c 100644
--- a/whois/__init__.py
+++ b/whois/__init__.py
@@ -305,6 +305,7 @@ def query(
     domain: str,
     force: bool = False,
     cache_file: Optional[str] = None,
+    cache_age: int = 60 * 60 * 48,
     slow_down: int = 0,
     ignore_returncode: bool = False,
     server: Optional[str] = None,
@@ -317,6 +318,7 @@ def query(
     """
     force=True          Don't use cache.
     cache_file=<path>   Use file to store cache not only memory.
+    cache_age=172800    Cache expiration time for given domain, in seconds
     slow_down=0         Time [s] it will wait after you query WHOIS database.
                         This is useful when there is a limit to the number of requests at a time.
     server:             if set use the whois server explicitly for making the query:
@@ -368,6 +370,7 @@ def query(
             dl=dl,
             force=force,
             cache_file=cache_file,
+            cache_age=cache_age,
             slow_down=slow_down,
             ignore_returncode=ignore_returncode,
             server=server,