googleapis
diff --git a/‎setup.py
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+3-2Lines changed: 3 additions & 2 deletions b/‎setup.py
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+3-2Lines changed: 3 additions & 2 deletions
diff --git a/‎testing/constraints-3.6.txt
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+1Lines changed: 1 addition & 0 deletions b/‎testing/constraints-3.6.txt
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+1Lines changed: 1 addition & 0 deletions
@@ -39,8 +39,9 @@
     # Until this issue is closed
     # https://github.com/googleapis/google-cloud-python/issues/10566
     "google-cloud-core >= 1.4.1, <3.0.0dev",
-    "grpc-google-iam-v1 >= 0.12.3, < 0.13dev",
-    "proto-plus >= 1.15.0",
+    "grpc-google-iam-v1 >=0.12.4, <1.0.0dev",
+    "proto-plus >= 1.15.0, <2.0.0dev",
+    "protobuf >= 3.19.0, <4.0.0dev",
 ]
 extras = {}
 
 
@@ -8,3 +8,4 @@
 google-api-core==1.31.5
 google-cloud-core==1.4.1
 proto-plus==1.15.0
+protobuf==3.19.0