diff --git a/pkgs/development/python-modules/cirq-google/default.nix b/pkgs/development/python-modules/cirq-google/default.nix
index 8692aef4b678..900189dc2edb 100644
--- a/pkgs/development/python-modules/cirq-google/default.nix
+++ b/pkgs/development/python-modules/cirq-google/default.nix
@@ -16,7 +16,9 @@ buildPythonPackage rec {
   sourceRoot = "source/${pname}";
 
   postPatch = ''
-    substituteInPlace requirements.txt --replace "protobuf~=3.13.0" "protobuf"
+    substituteInPlace requirements.txt \
+      --replace "protobuf~=3.13.0" "protobuf" \
+      --replace "google-api-core[grpc] >= 1.14.0, < 2.0.0dev" "google-api-core[grpc] >= 1.14.0, < 3.0.0dev"
   '';
 
   propagatedBuildInputs = [