diff --git a/vrt/package.json b/vrt/package.json
index 7ba1c65..cdf175c 100644
--- a/vrt/package.json
+++ b/vrt/package.json
@@ -6,7 +6,7 @@
   "author": "bokuweb <bokuweb12@gmail.com>",
   "license": "MIT",
   "devDependencies": {
-    "libreoffice-convert": "1.3.0"
+    "libreoffice-convert": "1.3.1"
   },
   "dependencies": {
     "glob": "^7.1.6"
diff --git a/vrt/yarn.lock b/vrt/yarn.lock
index 668c98d..8333b07 100644
--- a/vrt/yarn.lock
+++ b/vrt/yarn.lock
@@ -57,10 +57,10 @@ inherits@2:
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
   integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
 
-libreoffice-convert@1.3.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/libreoffice-convert/-/libreoffice-convert-1.3.0.tgz#8b0cfc18245c6ef4f7a0f9124e6df6a02a511bd2"
-  integrity sha512-MLM5q91/YjLlQN3Z5RuLIPFeNvDPRgniFEH+rHeysQAGJAwlSMDBg9xmQpuGJ2QxCZsSZNGskJdlnc3vSJq0TA==
+libreoffice-convert@1.3.1:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/libreoffice-convert/-/libreoffice-convert-1.3.1.tgz#c77967d5fd252bec46844894ab1e1480f1255ddd"
+  integrity sha512-F3zhQNVkK7LL7Rult7dmuXqYelfsSf7EQ5medQzKWnoipJY0fq0R57FaN6BV6zdekp71dIA8F7xVf8F3CASfCA==
   dependencies:
     async "^2.6.2"
     tmp "^0.2.1"