diff --git a/jsony.nimble b/jsony.nimble
index 48f0b1c..e444709 100644
--- a/jsony.nimble
+++ b/jsony.nimble
@@ -5,4 +5,4 @@ license     = "MIT"
 
 srcDir = "src"
 
-requires "nim >= 1.2.2"
+requires "nim >= 1.4.0"