diff --git a/requirements/base.in b/requirements/base.in
index a2e8109b..d1595704 100644
--- a/requirements/base.in
+++ b/requirements/base.in
@@ -18,4 +18,6 @@ sqlparse
 
 # pin these libs because latest flake8 does not allow newer versions of importlib-metadata https://github.com/PyCQA/flake8/issues/1522
 importlib-metadata==4.2.0
-virtualenv==20.16.2
\ No newline at end of file
+virtualenv==20.16.2
+
+isort==5.11.*
\ No newline at end of file
diff --git a/requirements/dev.txt b/requirements/dev.txt
index d71177a3..8ce0ede6 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -85,8 +85,10 @@ importlib-metadata==4.2.0
     # via -r requirements/base.in
 iniconfig==2.0.0
     # via pytest
-isort==5.12.0
-    # via flake8-isort
+isort==5.11.4
+    # via
+    #   -r requirements/base.in
+    #   flake8-isort
 jmespath==1.0.1
     # via
     #   boto3
diff --git a/requirements/prod.txt b/requirements/prod.txt
index a562f4b1..5ccfc096 100644
--- a/requirements/prod.txt
+++ b/requirements/prod.txt
@@ -49,6 +49,8 @@ idna==3.4
     # via requests
 importlib-metadata==4.2.0
     # via -r requirements/base.in
+isort==5.11.4
+    # via -r requirements/base.in
 jmespath==1.0.1
     # via
     #   boto3
diff --git a/requirements/test.txt b/requirements/test.txt
index 48be7976..c3cc09f1 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -76,8 +76,10 @@ importlib-metadata==4.2.0
     # via -r requirements/base.in
 iniconfig==2.0.0
     # via pytest
-isort==5.12.0
-    # via flake8-isort
+isort==5.11.4
+    # via
+    #   -r requirements/base.in
+    #   flake8-isort
 jmespath==1.0.1
     # via
     #   boto3