diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 98da8fdadf4565d9d06cdb6ca5d2ef7e88e844b0..e4ce2fd7df46422e1e91cacda468986796418f7d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,7 +8,7 @@ build:
   stage: build
 
   before_script:
-    - apt-get update -qq && apt-get install -y -qq libnetcdf-dev libnetcdff-dev libeccodes-dev netcdf-bin
+    - apt-get update -qq && apt-get install -y -qq gfortran libnetcdf-dev libnetcdff-dev libeccodes-dev netcdf-bin
 
   script:
     - export FC=gfortran