diff --git a/Makefile b/Makefile
index fc3e9f0..05200cf 100644
--- a/Makefile
+++ b/Makefile
@@ -9,4 +9,4 @@ check-format:
 	dhall type --file package-set.dhall;
 	@echo checked dhall files are well-typed.
 ci: check-format
-	vessel verify --version 0.11.2
+	vessel verify --version 0.11.3
diff --git a/index/base.dhall b/index/base.dhall
index 78ad72b..1536b60 100644
--- a/index/base.dhall
+++ b/index/base.dhall
@@ -5,6 +5,6 @@
 , authors = [ "DFINITY Languages Team" ]
 , owners = [ "dfinity" ]
 , repo = "https://github.com/dfinity/motoko-base.git"
-, version = "cb79b657d9156f44bf7d195331af3aa88953467a"
+, version = "2dca37c48e6c8f3225eb78f6d32486819a89eb88"
 , dependencies = [] : List Text
 }