diff --git a/Cartfile b/Cartfile
index 59ac6ff..be273bf 100644
--- a/Cartfile
+++ b/Cartfile
@@ -1,4 +1,4 @@
-github "readium/r2-shared-swift" == 1.3.4
+github "readium/r2-shared-swift" == 1.4.0
 github "stephencelis/SQLite.swift" == 0.12.2
 github "krzyzanowskim/CryptoSwift" == 0.15.0
 github "weichsel/ZIPFoundation" == 0.9.8