diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 66f5eb5..fd1f43e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,10 +6,11 @@ build:
     image: espressif/idf:release-v4.1
     stage: build
 
-    artifacts:
+    cache:
+        key: "$CI_BUILD_REF_NAME"
         paths:
             - sdkconfig
-            - build/
+            - build
 
     script:
         - if [ -f sdkconfig ]; then
@@ -25,6 +26,12 @@ flash:
     image: espressif/idf:release-v4.1
     stage: flash
 
+    cache:
+        key: "$CI_BUILD_REF_NAME"
+        paths:
+            - sdkconfig
+            - build
+
     script:
         - cat sdkconfig
         - idf.py flash