diff --git a/readme.md b/readme.md
index 862a5d1..f036c9c 100644
--- a/readme.md
+++ b/readme.md
@@ -3,4 +3,4 @@ This repository stores the source code for the Ignore X-Frame-Options Firefox ex
 The extension allows you to load remote content in iframes even if the server disallow framing
 
 # Compatibility
-- Firefox Quantum 61 ~+
\ No newline at end of file
+- Firefox Quantum 48+