diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6d9ba29..07a9d5d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -13,7 +13,7 @@ stages:
 
 build:executable:
   stage: build
-  image: crystallang/crystal:1.5
+  image: crystallang/crystal:1.5.0
   script:
     # Debug
     - crystal version
diff --git a/Makefile b/Makefile
index b7785f1..3c23a9d 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ all: build
 
 build:
 	shards install
-	shards build
+	shards build --error-trace
 
 docker: docker-build docker-test docker-push