diff --git a/requirements.txt b/requirements.txt
index 0c32443a..25c91df8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -449,9 +449,9 @@ pip-tools==7.5.1 \
     --hash=sha256:a051a94794ba52df9acad2d7c9b0b09ae001617db458a543f8287fea7b89c2cf \
     --hash=sha256:f5ff803823529edc0e6e40c86b1aa7da7266fb1078093c8beea4e5b77877036a
     # via -r requirements.in
-proto-plus==1.26.1 \
-    --hash=sha256:13285478c2dcf2abb829db158e1047e2f1e8d63a077d94263c2b88b043c75a66 \
-    --hash=sha256:21a515a4c4c0088a773899e23c7bbade3d18f9c66c73edd4c7ee3816bc96a012
+proto-plus==1.27.1 \
+    --hash=sha256:912a7460446625b792f6448bade9e55cd4e41e6ac10e27009ef71a7f317fa147 \
+    --hash=sha256:e4643061f3a4d0de092d62aa4ad09fa4756b2cbb89d4627f3985018216f9fefc
     # via
     #   google-api-core
     #   google-cloud-spanner