diff --git a/protoc-go/Dockerfile b/protoc-go/Dockerfile
index 10b1818..7b6044b 100644
--- a/protoc-go/Dockerfile
+++ b/protoc-go/Dockerfile
@@ -1,6 +1,6 @@
 FROM golang:1.18.0-alpine as builder
 
-ENV S12_PROTO_VERSION 1.29.0
+ENV S12_PROTO_VERSION 1.31.0
 
 # install dependencies and build/install Go
 ADD . /src
diff --git a/protoc-go/version.txt b/protoc-go/version.txt
index 076e9c7..b9f2e5f 100644
--- a/protoc-go/version.txt
+++ b/protoc-go/version.txt
@@ -1 +1 @@
-3.20.1
+3.20.2