diff --git a/frontend/yarn.lock b/frontend/yarn.lock
old mode 100755
new mode 100644
index c7f6361..1bcd112
--- 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==
@@ -1893,7 +1873,7 @@ debug@2.6.9, debug@^2.1.2, debug@^2.2.0, debug@^2.3.3, debug@^2.6.8:
   dependencies:
     ms "2.0.0"
 
-debug@3.1.0, debug@=3.1.0:
+debug@3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
   integrity sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==
@@ -2681,11 +2661,9 @@ flush-write-stream@^1.0.0:
     readable-stream "^2.3.6"
 
 follow-redirects@^1.0.0:
-  version "1.6.1"
-  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.6.1.tgz#514973c44b5757368bad8bddfe52f81f015c94cb"
-  integrity sha512-t2JCjbzxQpWvbhts3l6SH1DKzSrx8a+SsaVf4h6bG4kOXUuPYS/kg2Lr4gQSb7eemaHqJkOThF1BGyjlUkO1GQ==
-  dependencies:
-    debug "=3.1.0"
+  version "1.14.8"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.14.8.tgz#016996fb9a11a100566398b1c6839337d7bfa8fc"
+  integrity sha512-1x0S9UVJHsQprFcEC/qnNzBLcIxsjAV905f/UkQxbclCsoTWlacCNOpQa/anodLl2uaEKFhfWOvM2Qg77+15zA==
 
 for-in@^0.1.3:
   version "0.1.8"
@@ -5866,7 +5844,7 @@ 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 +6964,6 @@ 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"