diff --git a/README b/README
index ab00f1e..e419149 100644
--- a/README
+++ b/README
@@ -22,7 +22,7 @@ Usage
 Dependencies
 ------------
 
-   Rust 1.15 or later is required to build.
+   Rust 1.20 or later is required to build.
 
 Specifications
 --------------