diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index 0f58d6a0ccf3..931e5d1265e7 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -495,8 +495,8 @@ in
       "sha256-ha8UiyvXgKk/G98JZYIfJh3v2EKWZwgxNir6BL0+RjU=";
 
   mypy-boto3-emr =
-    buildMypyBoto3Package "emr" "1.42.70"
-      "sha256-xfiBuaUkQUua4XPzGRDuk4VE2yKyy2E9mOu6TuJHEWY=";
+    buildMypyBoto3Package "emr" "1.42.77"
+      "sha256-BNf5bHJc1SVZ1HdMRV49gU7vUGs3y25jRRhnDWiwbAo=";
 
   mypy-boto3-emr-containers =
     buildMypyBoto3Package "emr-containers" "1.42.3"