diff --git a/packages/google-cloud-secret-manager/setup.py b/packages/google-cloud-secret-manager/setup.py
index fe1c04e8b58d..156b16016c67 100644
--- a/packages/google-cloud-secret-manager/setup.py
+++ b/packages/google-cloud-secret-manager/setup.py
@@ -31,7 +31,10 @@
 with open(
     os.path.join(package_root, "google/cloud/secretmanager/gapic_version.py")
 ) as fp:
-    version_candidates = re.findall(r"(?<=\")\d+.\d+.\d+(?=\")", fp.read())
+    version_candidates = re.findall(
+        r"(?<=\")\d+\.\d+\.\d+[^\"\s]*(?=\")",
+        fp.read(),
+    )
     assert len(version_candidates) == 1
     version = version_candidates[0]