diff --git a/nix/sources.json b/nix/sources.json
index cc6d4ab383e..cafef8ee1ff 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -75,10 +75,10 @@
         "homepage": "",
         "owner": "dfinity",
         "repo": "motoko-base",
-        "rev": "adb24da4ce084a26bcd8daf046140eca8f76ac4a",
-        "sha256": "0lhyskqpsijc84c168icivmcg30pcac3645m6s3qa28zsw58k73h",
+        "rev": "4ace26675fc1222daefb24ac160e0d03000429d2",
+        "sha256": "0v05djp8ymwc5c9y8ms80cqzx8h2jb9fskfmw8l2mszdcwn8ahsw",
         "type": "tarball",
-        "url": "https://github.com/dfinity/motoko-base/archive/adb24da4ce084a26bcd8daf046140eca8f76ac4a.tar.gz",
+        "url": "https://github.com/dfinity/motoko-base/archive/4ace26675fc1222daefb24ac160e0d03000429d2.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "motoko-matchers": {