diff --git a/frontend/yarn.lock b/frontend/yarn.lock
old mode 100755
new mode 100644
index c7f6361..1f1b496
--- a/frontend/yarn.lock
+++ b/frontend/yarn.lock
@@ -92,16 +92,6 @@
     rxjs "6.3.3"
     source-map "0.7.3"
 
-"@angular-devkit/core@^0.6.8":
-  version "0.6.8"
-  resolved "https://registry.yarnpkg.com/@angular-devkit/core/-/core-0.6.8.tgz#3b09d97bd2588f0091df11921f7ed772431806aa"
-  integrity sha512-rkIa1OSVWTt4g9leLSK/PsqOj3HZbDKHbZjqlslyfVa3AyCeiumFoOgViOVXlYgPX3HHDbE5uH24nyUWSD8uww==
-  dependencies:
-    ajv "~6.4.0"
-    chokidar "^2.0.3"
-    rxjs "^6.0.0"
-    source-map "^0.5.6"
-
 "@angular-devkit/schematics@7.3.1":
   version "7.3.1"
   resolved "https://registry.yarnpkg.com/@angular-devkit/schematics/-/schematics-7.3.1.tgz#7dc704005b966ea6c1ee62f380120183bb76eee6"
@@ -563,16 +553,6 @@ ajv@^6.1.0, ajv@^6.5.5:
     json-schema-traverse "^0.4.1"
     uri-js "^4.2.2"
 
-ajv@~6.4.0:
-  version "6.4.0"
-  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.4.0.tgz#d3aff78e9277549771daf0164cff48482b754fc6"
-  integrity sha1-06/3jpJ3VJdx2vAWTP9ISCt1T8Y=
-  dependencies:
-    fast-deep-equal "^1.0.0"
-    fast-json-stable-stringify "^2.0.0"
-    json-schema-traverse "^0.3.0"
-    uri-js "^3.0.2"
-
 amdefine@>=0.0.4:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/amdefine/-/amdefine-1.0.1.tgz#4a5282ac164729e93619bcfd3ad151f817ce91f5"
@@ -1377,7 +1357,7 @@ chokidar@^1.4.1, chokidar@^1.4.2:
   optionalDependencies:
     fsevents "^1.0.0"
 
-chokidar@^2.0.0, chokidar@^2.0.2, chokidar@^2.0.3:
+chokidar@^2.0.0, chokidar@^2.0.2:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-2.1.1.tgz#adc39ad55a2adf26548bd2afa048f611091f9184"
   integrity sha512-gfw3p2oQV2wEt+8VuMlNsPjCxDxvvgnm/kz+uATu805mWVF8IJN7uz9DN7iBz+RMJISmiVbCOBFs9qBGMjtPfQ==
@@ -5171,9 +5151,9 @@ path-key@^2.0.0, path-key@^2.0.1:
   integrity sha1-QRyttXTFoUDTpLGRDUDYDMn0C0A=
 
 path-parse@^1.0.5, path-parse@^1.0.6:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.6.tgz#d62dbb5679405d72c4737ec58600e9ddcf06d24c"
-  integrity sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.7.tgz#fbc114b60ca42b30d9daf5858e4bd68bbedb6735"
+  integrity sha512-LDJzPVEEEPR+y48z93A0Ed0yXb8pAByGWo/k5YYdYgpY2/2EsOsksJrq7lOHxryrVOn1ejG6oAp8ahvOIQD8sw==
 
 path-to-regexp@0.1.7:
   version "0.1.7"
@@ -5866,7 +5846,7 @@ rxjs@6.3.3:
   dependencies:
     tslib "^1.9.0"
 
-rxjs@^6.0.0, rxjs@^6.1.0, rxjs@^6.4.0:
+rxjs@^6.1.0, rxjs@^6.4.0:
   version "6.4.0"
   resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.4.0.tgz#f3bb0fe7bda7fb69deac0c16f17b50b0b8790504"
   integrity sha512-Z9Yfa11F6B9Sg/BK9MnqnQ+aQYicPLtilXBp2yUtDt2JRCE0h26d33EnfO3ZxoNxG0T92OUucP3Ct7cpfkdFfw==
@@ -6986,13 +6966,6 @@ upath@^1.0.5, upath@^1.1.0:
   resolved "https://registry.yarnpkg.com/upath/-/upath-1.1.0.tgz#35256597e46a581db4793d0ce47fa9aebfc9fabd"
   integrity sha512-bzpH/oBhoS/QI/YtbkqCg6VEiPYjSZtrHQM6/QnJS6OL9pKUFLqb3aFh4Scvwm45+7iAgiMkLhSbaZxUqmrprw==
 
-uri-js@^3.0.2:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/uri-js/-/uri-js-3.0.2.tgz#f90b858507f81dea4dcfbb3c4c3dbfa2b557faaa"
-  integrity sha1-+QuFhQf4HepNz7s8TD2/orVX+qo=
-  dependencies:
-    punycode "^2.1.0"
-
 uri-js@^4.2.2:
   version "4.2.2"
   resolved "https://registry.yarnpkg.com/uri-js/-/uri-js-4.2.2.tgz#94c540e1ff772956e2299507c010aea6c8838eb0"