diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0715df13757c61e369ce807c282305673090b215..c5b573f96fe8d8d6f67ccca686105379c83d157d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,7 +5,7 @@ stages:
 
 variables:
   CPU_CORES: "10"
-  OCAML: "ocaml-base-compiler.4.07.1"
+  OCAML: "ocaml-variants.4.14.0+options ocaml-option-flambda"
 
 .template: &template
   stage: build