diff --git a/package-lock.json b/package-lock.json
index 3e675e9..badc626 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,9 +21,9 @@
       }
     },
     "commander": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-5.0.0.tgz",
-      "integrity": "sha512-JrDGPAKjMGSP1G0DUoaceEJ3DZgAfr/q6X7FVk4+U5KxUSKviYGM2k6zWkfyyBHy5rAtzgYJFa1ro2O9PtoxwQ=="
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-5.1.0.tgz",
+      "integrity": "sha512-P0CysNDQ7rtVw4QIQtm+MRxV66vKFSvlsQvGYXZWR3qFU0jlMKHZZZgw8e+8DSah4UDKMqnknRDQz+xuQXQ/Zg=="
     },
     "concat-map": {
       "version": "0.0.1",
diff --git a/package.json b/package.json
index 4d0b324..413bb67 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "url": "git+https://github.com/eklem/stopword-trainer.git"
   },
   "dependencies": {
-    "commander": "~5.0.0",
+    "commander": "~5.1.0",
     "lodash": ">=4.17.15",
     "ndjson": "~1.5.0",
     "object-end-keys": "^3.0.1"