diff --git a/package.json b/package.json
index 0582925..0546ff9 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,7 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "@aureooms/js-fingertree": "5.0.0",
+    "@aureooms/js-fingertree": "5.0.2",
     "@aureooms/js-itertools": "4.1.0",
     "@aureooms/js-measure": "1.0.3",
     "@aureooms/js-predicate": "2.0.2",
diff --git a/yarn.lock b/yarn.lock
index 61df540..565d4fa 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -14,10 +14,10 @@
   resolved "https://registry.yarnpkg.com/@aureooms/js-error/-/js-error-4.0.1.tgz#be2740b3f31a337e0828930c9b70d38113b4dd77"
   integrity sha512-zsgs6wmnRsKljlusewYiBaFBM/hIJp43b7OwE9ybpLEL4wfXjGP17cJTTAY8gpzALVFwEA5/flxIK0I6gJJLHQ==
 
-"@aureooms/js-fingertree@5.0.0":
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/@aureooms/js-fingertree/-/js-fingertree-5.0.0.tgz#133d9bd5d047448f07706e4a83b9a7b96dc493a6"
-  integrity sha512-E+pBH4Ryw/gnL6xpqVlc3SMAPBKh5NPVf12LYP9On4Kx25Rcw5jsFujRsdyrqO11wVM85QVTM/xYnLLATnPSPQ==
+"@aureooms/js-fingertree@5.0.2":
+  version "5.0.2"
+  resolved "https://registry.yarnpkg.com/@aureooms/js-fingertree/-/js-fingertree-5.0.2.tgz#731979850f6d7767c65bfb66cc34db38f0b8b28a"
+  integrity sha512-AjWsSIS5S6hJp5uAQh8y89A1sVcRcD0qL6S64YGtoaJJBJ5lPBX58HDjmTq8nIrBRFv2T7VLUsfGCPJImwq2pQ==
 
 "@aureooms/js-itertools@4.1.0":
   version "4.1.0"