diff --git a/package.json b/package.json
index d8bec64..8c8a7f5 100644
--- a/package.json
+++ b/package.json
@@ -80,7 +80,7 @@
     "@aureooms/js-array": "4.0.0",
     "@aureooms/js-compare": "1.4.8",
     "@aureooms/js-functools": "2.0.3",
-    "@aureooms/js-itertools": "5.0.1",
+    "@aureooms/js-itertools": "5.1.1",
     "@aureooms/js-random": "2.0.0",
     "@aureooms/js-search": "0.0.4",
     "@aureooms/js-sll": "1.0.2",
diff --git a/yarn.lock b/yarn.lock
index fd15835..7cdcb9e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7,35 +7,35 @@
   resolved "https://registry.yarnpkg.com/@aureooms/js-array/-/js-array-4.0.0.tgz#ea64b7c788644f40bbb92259a6098ac14a4eca6c"
   integrity sha1-6mS3x4hkT0C7uSJZpgmKwUpOymw=
 
-"@aureooms/js-collections-deque@^6.0.1":
-  version "6.0.1"
-  resolved "https://registry.yarnpkg.com/@aureooms/js-collections-deque/-/js-collections-deque-6.0.1.tgz#ba89379ac826539047f768e1fb84ed4d2c1f829e"
-  integrity sha512-GUhEIF6tmnxsGvUaPSR/7HbZETn04yHOcrt7swo5ftKRz+Pb/N9iuvGimBwmCTLDkJ60OZG2TWfoYPVNA2lutQ==
+"@aureooms/js-collections-deque@^7.0.0":
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/@aureooms/js-collections-deque/-/js-collections-deque-7.0.0.tgz#ff03a4901c956d277fa9d6a149104dc65c85f9ae"
+  integrity sha512-zWtMs1sTLGHBtKrjhJ4hZKcG54o4VSthCYn6sLA7pJeOc1FSEwKFyCaJq/BuSjY7rmhNVklTGhENjLyTl7ESVA==
   dependencies:
-    "@aureooms/js-error" "^5.0.2"
+    "@aureooms/js-error" "^5.0.3"
 
 "@aureooms/js-compare@1.4.8":
   version "1.4.8"
   resolved "https://registry.yarnpkg.com/@aureooms/js-compare/-/js-compare-1.4.8.tgz#c6bff1091f4a2e211f449299572d9f195146fc59"
   integrity sha512-Z26PU6OmuhS7ZJsELTKImmipF7J+KCOyN70wBhhVIhmqUhXY6C3JpJHAev6wNBkC4ThlQt3zO6p/OmBFIq76Qg==
 
-"@aureooms/js-error@^5.0.2":
-  version "5.0.2"
-  resolved "https://registry.yarnpkg.com/@aureooms/js-error/-/js-error-5.0.2.tgz#dc2ad2fc2b10365581c32c28222daccc5c3c9600"
-  integrity sha512-HLO95kmZ1nJV5qo8Xq7czHVskFGPkM3l60JFgdTnpvCH6P6lkyWDBplaDB9gI5cPvcRIZDs1HeAHhAlHR/jBxw==
+"@aureooms/js-error@^5.0.3":
+  version "5.0.3"
+  resolved "https://registry.yarnpkg.com/@aureooms/js-error/-/js-error-5.0.3.tgz#e4cb52e3525028e4725a5886663a67a0749abf6b"
+  integrity sha512-hGLMr9UIgPubX72V7vS69N8toMoK52emuA9jV/EOleK4m7HUF0HjdssNXZytd+udyY3996CBre89MOgTEn0Udw==
 
 "@aureooms/js-functools@2.0.3":
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/@aureooms/js-functools/-/js-functools-2.0.3.tgz#5139d6245278193da4cf21c44666797bf40a1d6e"
   integrity sha1-UTnWJFJ4GT2kzyHERmZ5e/QKHW4=
 
-"@aureooms/js-itertools@5.0.1":
-  version "5.0.1"
-  resolved "https://registry.yarnpkg.com/@aureooms/js-itertools/-/js-itertools-5.0.1.tgz#73af47b0a710073730fccde6c57431a9178d1bea"
-  integrity sha512-EBmA0EiY49MSu7M6eCZvUyEhV79bvIQDg/LL3bfUG8fxhL4IeBLbgYc41a4/LunD5mLFG8ZQna/Z/oUjr4fUuQ==
+"@aureooms/js-itertools@5.1.1":
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/@aureooms/js-itertools/-/js-itertools-5.1.1.tgz#cebca2e4ccfcbbfbb447f60a90a86dac8f457166"
+  integrity sha512-WP+/gtDOJeYSa1ICRSUKtJNQs+2emU25eBnR1G+HPko5m8vbzdFBo1iHbl1IHfRDOyMn40oMvpYovC1Fh6VJwA==
   dependencies:
-    "@aureooms/js-collections-deque" "^6.0.1"
-    "@aureooms/js-error" "^5.0.2"
+    "@aureooms/js-collections-deque" "^7.0.0"
+    "@aureooms/js-error" "^5.0.3"
 
 "@aureooms/js-random@2.0.0":
   version "2.0.0"