diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index 8cbd80992a0f..1d7b88361d5e 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -969,8 +969,8 @@ in
       "sha256-o2X4h4K/Cf/TnZG3P5uDjdVmYJRcwPlv6DnSwdzOgc0=";
 
   mypy-boto3-opensearch =
-    buildMypyBoto3Package "opensearch" "1.42.1"
-      "sha256-FAm2r+uayaywaxC7Fo5AQ/Y3UWr0ZL6vqg083hC/pw0=";
+    buildMypyBoto3Package "opensearch" "1.42.3"
+      "sha256-ogbRcf2fGNYSGGvCMRi91iyhFDtxLvoPY7YmnDpI7z0=";
 
   mypy-boto3-opensearchserverless =
     buildMypyBoto3Package "opensearchserverless" "1.42.1"