diff --git a/.gitignore b/.gitignore
index 16bbea59..2fb4c373 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,7 +25,7 @@ coverage
 # nyc test coverage
 .nyc_output
 
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
 .grunt
 
 # Bower dependency directory (https://bower.io/)
@@ -291,6 +291,9 @@ fabric.properties
 # Editor-based Rest Client
 .idea/httpRequests
 
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
 # SublimeText rules
 # Cache files for Sublime Text
 *.tmlanguage.cache