diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
index 88ea3aa1e..f69257a71 100644
--- a/.idea/codeStyles/Project.xml
+++ b/.idea/codeStyles/Project.xml
@@ -3,6 +3,11 @@
     <JetCodeStyleSettings>
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
     </JetCodeStyleSettings>
+    <codeStyleSettings language="PROTO">
+      <indentOptions>
+        <option name="INDENT_SIZE" value="2" />
+      </indentOptions>
+    </codeStyleSettings>
     <codeStyleSettings language="XML">
       <indentOptions>
         <option name="CONTINUATION_INDENT_SIZE" value="4" />