diff --git a/.idea/optslib.iml b/.idea/optslib.iml
index 4348106..24c8dff 100644
--- a/.idea/optslib.iml
+++ b/.idea/optslib.iml
@@ -4,6 +4,7 @@
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/tests" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/build" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />