diff --git a/BonMot.podspec b/BonMot.podspec
index 8892a092..1d5f0930 100644
--- a/BonMot.podspec
+++ b/BonMot.podspec
@@ -2,7 +2,7 @@ Pod::Spec.new do |s|
   s.name             = "BonMot"
   s.version          = "5.4"
   s.summary          = "Beautiful, easy attributed strings in Swift"
-  s.swift_versions    = ["4.2", "5.0"]
+  s.swift_versions    = ["4.0", "4.2", "5.0"]
   s.description      = <<-DESC
   BonMot removes all the mystery from creating beautiful, powerful attributed strings in Swift.
                        DESC