diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 84f417095bb4576e2e4e012c484b31d7de1a098f..a858d212ba897e8303393793450d6952410c212e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -27,6 +27,10 @@ windows:
   tags:
     - Windows
   stage: build
+  cache:
+    key: build-cache
+    paths:
+      - build/
   script:
     - $OPT_DIR = "C:/opt/x64"
     - $FFTW3_INCLUDE_DIR = "$OPT_DIR/include"