diff --git a/testplans/composer/Dockerfile b/testplans/composer/Dockerfile
index c0310c3bc..6142650be 100644
--- a/testplans/composer/Dockerfile
+++ b/testplans/composer/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.14.4-buster as tg-build
+FROM golang:1.15-buster as tg-build
 
 ARG TESTGROUND_REF="oni"
 WORKDIR /usr/src