diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 705ced26ba490e54fd2f77a26cf7fae1a7ddd1f5..d7f7fe0bf020e64e9f237b0685bf7bba2e4b8882 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,7 +9,7 @@ cache:
 variables:
   REPO_DIR: gitlab.com/elixxir
   REPO_NAME: primitives
-  DOCKER_IMAGE: elixxirlabs/cuda-go:latest
+  DOCKER_IMAGE: elixxirlabs/cuda-go:go1.15-cuda10.2
   MIN_CODE_COVERAGE: "89.0"
 
 before_script:
diff --git a/go.mod b/go.mod
index 6fae8568ad018c2973976e83dc39c166f063114d..9e175fddd6fe051abeced4e015b8da33b008c3b9 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,7 @@
 module gitlab.com/xx_network/primitives
 
+go 1.15
+
 require (
 	github.com/pkg/errors v0.9.1
 	github.com/spf13/jwalterweatherman v1.1.0