diff --git a/yarn.lock b/yarn.lock
index 5988921..a93cf87 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -352,7 +352,7 @@ chownr@^1.1.1:
   resolved "https://registry.yarnpkg.com/chownr/-/chownr-1.1.1.tgz#54726b8b8fff4df053c42187e801fb4412df1494"
   integrity sha512-j38EvO5+LHX84jlo6h4UzmOwi0UgW61WRyPtJz4qaadK5eY3BTS5TY/S1Stc3Uk2lIM6TPevAlULiEJwie860g==
 
-chrome-headless-render-pdf@^1.8.0:
+chrome-headless-render-pdf@1.8.0:
   version "1.8.0"
   resolved "https://registry.yarnpkg.com/chrome-headless-render-pdf/-/chrome-headless-render-pdf-1.8.0.tgz#7d932e72508be819ddf13294f2f5b21ed653fb68"
   integrity sha512-dFm2oQc1btPxoNfG9vONY/yGU3el0HO6cp8YK3w4FgotNcoEXKsmE+WfmEO4A+FWF7eFshjvEKWjBp/gvyufuA==
@@ -1652,7 +1652,7 @@ node-pre-gyp@^0.10.0:
     semver "^5.3.0"
     tar "^4"
 
-nodemon@^1.18.9:
+nodemon@1.18.9:
   version "1.18.9"
   resolved "https://registry.yarnpkg.com/nodemon/-/nodemon-1.18.9.tgz#90b467efd3b3c81b9453380aeb2a2cba535d0ead"
   integrity sha512-oj/eEVTEI47pzYAjGkpcNw0xYwTl4XSTUQv2NPQI6PpN3b75PhpuYk3Vb3U80xHCyM2Jm+1j68ULHXl4OR3Afw==
@@ -2452,11 +2452,9 @@ ultron@~1.1.0:
   integrity sha512-UIEXBNeYmKptWH6z8ZnqTeS8fV74zG0/eRU9VGkpzz+LIJNs8W/zM/L+7ctCkRrgbNnnR0xxw4bKOr0cW0N0Og==
 
 undefsafe@^2.0.2:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/undefsafe/-/undefsafe-2.0.2.tgz#225f6b9e0337663e0d8e7cfd686fc2836ccace76"
-  integrity sha1-Il9rngM3Zj4Njnz9aG/Cg2zKznY=
-  dependencies:
-    debug "^2.2.0"
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/undefsafe/-/undefsafe-2.0.5.tgz#38733b9327bdcd226db889fb723a6efd162e6e2c"
+  integrity sha512-WxONCrssBM8TSPRqN5EmsjVrsv4A8X12J4ArBiiayv3DyyG3ZlIg6yysuuSYdZsVz3TKcTg2fd//Ujd4CHV1iA==
 
 union-value@^1.0.0:
   version "1.0.0"