diff --git a/pkgs/development/tools/aws-sam-cli/default.nix b/pkgs/development/tools/aws-sam-cli/default.nix
index 70fb86559d9..c4095a6f9b3 100644
--- a/pkgs/development/tools/aws-sam-cli/default.nix
+++ b/pkgs/development/tools/aws-sam-cli/default.nix
@@ -59,6 +59,7 @@ buildPythonApplication rec {
   postPatch = ''
     substituteInPlace requirements/base.txt --replace "requests==2.20.1" "requests==2.21.0"
     substituteInPlace requirements/base.txt --replace "six~=1.11.0" "six~=1.12.0"
+    substituteInPlace requirements/base.txt --replace "PyYAML~=3.12" "PyYAML~=5.1"
   '';
 
   meta = with lib; {