diff --git a/synthtool/gcp/templates/java_library/.kokoro/requirements.txt b/synthtool/gcp/templates/java_library/.kokoro/requirements.txt
index 4a16dfadf..02ae42bb4 100644
--- a/synthtool/gcp/templates/java_library/.kokoro/requirements.txt
+++ b/synthtool/gcp/templates/java_library/.kokoro/requirements.txt
@@ -339,29 +339,33 @@ packaging==21.3 \
     # via
     #   -r requirements.in
     #   gcp-releasetool
-protobuf==3.20.2 \
-    --hash=sha256:03d76b7bd42ac4a6e109742a4edf81ffe26ffd87c5993126d894fe48a120396a \
-    --hash=sha256:09e25909c4297d71d97612f04f41cea8fa8510096864f2835ad2f3b3df5a5559 \
-    --hash=sha256:18e34a10ae10d458b027d7638a599c964b030c1739ebd035a1dfc0e22baa3bfe \
-    --hash=sha256:291fb4307094bf5ccc29f424b42268640e00d5240bf0d9b86bf3079f7576474d \
-    --hash=sha256:2c0b040d0b5d5d207936ca2d02f00f765906622c07d3fa19c23a16a8ca71873f \
-    --hash=sha256:384164994727f274cc34b8abd41a9e7e0562801361ee77437099ff6dfedd024b \
-    --hash=sha256:3cb608e5a0eb61b8e00fe641d9f0282cd0eedb603be372f91f163cbfbca0ded0 \
-    --hash=sha256:5d9402bf27d11e37801d1743eada54372f986a372ec9679673bfcc5c60441151 \
-    --hash=sha256:712dca319eee507a1e7df3591e639a2b112a2f4a62d40fe7832a16fd19151750 \
-    --hash=sha256:7a5037af4e76c975b88c3becdf53922b5ffa3f2cddf657574a4920a3b33b80f3 \
-    --hash=sha256:8228e56a865c27163d5d1d1771d94b98194aa6917bcfb6ce139cbfa8e3c27334 \
-    --hash=sha256:84a1544252a933ef07bb0b5ef13afe7c36232a774affa673fc3636f7cee1db6c \
-    --hash=sha256:84fe5953b18a383fd4495d375fe16e1e55e0a3afe7b4f7b4d01a3a0649fcda9d \
-    --hash=sha256:9c673c8bfdf52f903081816b9e0e612186684f4eb4c17eeb729133022d6032e3 \
-    --hash=sha256:a9e5ae5a8e8985c67e8944c23035a0dff2c26b0f5070b2f55b217a1c33bbe8b1 \
-    --hash=sha256:b4fdb29c5a7406e3f7ef176b2a7079baa68b5b854f364c21abe327bbeec01cdb \
-    --hash=sha256:c184485e0dfba4dfd451c3bd348c2e685d6523543a0f91b9fd4ae90eb09e8422 \
-    --hash=sha256:c9cdf251c582c16fd6a9f5e95836c90828d51b0069ad22f463761d27c6c19019 \
-    --hash=sha256:e39cf61bb8582bda88cdfebc0db163b774e7e03364bbf9ce1ead13863e81e359 \
-    --hash=sha256:e8fbc522303e09036c752a0afcc5c0603e917222d8bedc02813fd73b4b4ed804 \
-    --hash=sha256:f34464ab1207114e73bba0794d1257c150a2b89b7a9faf504e00af7c9fd58978 \
-    --hash=sha256:f52dabc96ca99ebd2169dadbe018824ebda08a795c7684a0b7d203a290f3adb0
+protobuf==3.19.5 \
+    --hash=sha256:1867f93b06a183f87696871bb8d1e99ee71dbb69d468ce1f0cc8bf3d30f982f3 \
+    --hash=sha256:3c4160b601220627f7e91154e572baf5e161a9c3f445a8242d536ee3d0b7b17c \
+    --hash=sha256:4ee2af7051d3b10c8a4fe6fd1a2c69f201fea36aeee7086cf202a692e1b99ee1 \
+    --hash=sha256:5266c36cc0af3bb3dbf44f199d225b33da66a9a5c3bdc2b14865ad10eddf0e37 \
+    --hash=sha256:5470f892961af464ae6eaf0f3099e2c1190ae8c7f36f174b89491281341f79ca \
+    --hash=sha256:66d14b5b90090353efe75c9fb1bf65ef7267383034688d255b500822e37d5c2f \
+    --hash=sha256:67efb5d20618020aa9596e17bfc37ca068c28ec0c1507d9507f73c93d46c9855 \
+    --hash=sha256:696e6cfab94cc15a14946f2bf72719dced087d437adbd994fff34f38986628bc \
+    --hash=sha256:6a02172b9650f819d01fb8e224fc69b0706458fc1ab4f1c669281243c71c1a5e \
+    --hash=sha256:6eca9ae238ba615d702387a2ddea635d535d769994a9968c09a4ca920c487ab9 \
+    --hash=sha256:950abd6c00e7b51f87ae8b18a0ce4d69fea217f62f171426e77de5061f6d9850 \
+    --hash=sha256:9e1d74032f56ff25f417cfe84c8147047732e5059137ca42efad20cbbd25f5e0 \
+    --hash=sha256:9e42b1cf2ecd8a1bd161239e693f22035ba99905ae6d7efeac8a0546c7ec1a27 \
+    --hash=sha256:9f957ef53e872d58a0afd3bf6d80d48535d28c99b40e75e6634cbc33ea42fd54 \
+    --hash=sha256:a89aa0c042e61e11ade320b802d6db4ee5391d8d973e46d3a48172c1597789f8 \
+    --hash=sha256:c0f80876a8ff0ae7064084ed094eb86497bd5a3812e6fc96a05318b92301674e \
+    --hash=sha256:c44e3282cff74ad18c7e8a0375f407f69ee50c2116364b44492a196293e08b21 \
+    --hash=sha256:d249519ba5ecf5dd6b18150c9b6bcde510b273714b696f3923ff8308fc11ae49 \
+    --hash=sha256:d3973a2d58aefc7d1230725c2447ce7f86a71cbc094b86a77c6ee1505ac7cdb1 \
+    --hash=sha256:dca2284378a5f2a86ffed35c6ac147d14c48b525eefcd1083e5a9ce28dfa8657 \
+    --hash=sha256:e63b0b3c42e51c94add62b010366cd4979cb6d5f06158bcae8faac4c294f91e1 \
+    --hash=sha256:f2b599a21c9a32e171ec29a2ac54e03297736c578698e11b099d031f79da114b \
+    --hash=sha256:f2bde37667b18c2b5280df83bc799204394a5d2d774e4deaf9de0eb741df6833 \
+    --hash=sha256:f4f909f4dde413dec435a44b0894956d55bb928ded7d6e3c726556ca4c796e84 \
+    --hash=sha256:f976234e20ab2785f54224bcdafa027674e23663b132fa3ca0caa291a6cfbde7 \
+    --hash=sha256:f9cebda093c2f6bfed88f1c17cdade09d4d96096421b344026feee236532d4de
     # via
     #   -r requirements.in
     #   gcp-docuploader