diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5180c51..885bb3f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -18,5 +18,5 @@ build windows x64:
     - docker:dind
   script: 
     - echo $CI_REGISTRY_PASSWORD | docker login -u $CI_REGISTRY_USER $CI_REGISTRY --password-stdin
-    - docker build -f Dockerfile-windows -t ${CI_REGISTRY_IMAGE}:windows-x64 .
+    - docker build --ulimit nofile=5000:5000 -f Dockerfile-windows -t ${CI_REGISTRY_IMAGE}:windows-x64 .
     - docker push ${CI_REGISTRY_IMAGE}:windows-x64
diff --git a/windows.sh b/windows.sh
index bf932a0..177e556 100755
--- a/windows.sh
+++ b/windows.sh
@@ -12,6 +12,11 @@ function min {
 # Leave wineserver running in the background
 setsid wineserver -p -f &
 
+# Increase open file limit
+echo " --- Increasing max. open file limit"
+ulimit -n 5120
+
+
 # Install tools
 echo " --- Installing tools"
 cd ~/.wine/drive_c/Program\ Files/