diff --git a/themes/harapeko2017/package-lock.json b/themes/harapeko2017/package-lock.json
index 080108d..61fe3ad 100644
--- a/themes/harapeko2017/package-lock.json
+++ b/themes/harapeko2017/package-lock.json
@@ -1738,66 +1738,23 @@
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@@ -2316,10 +2264,10 @@
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+      "resolved": "https://registry.npmjs.org/lodash.clonedeep/-/lodash.clonedeep-4.5.0.tgz",
+      "integrity": "sha1-4j8/nE+Pvd6HJSnBBxhXoIblzO8=",
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@@ -2789,6 +2737,12 @@
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+      "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.0.0.tgz",
+      "integrity": "sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ==",
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+    },
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@@ -3873,12 +3827,6 @@
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diff --git a/themes/harapeko2017/package.json b/themes/harapeko2017/package.json
index a3c365a..24d309e 100644
--- a/themes/harapeko2017/package.json
+++ b/themes/harapeko2017/package.json
@@ -14,7 +14,7 @@
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-    "gulp-sass": "5.0.0",
+    "gulp-sass": "5.1.0",
     "sakura.css": "1.3.1"
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   "scripts": {