diff --git a/backend/src/middleware/hashtags/extractHashtags.spec.js b/backend/src/middleware/hashtags/extractHashtags.spec.js
index 3c986b3b6..2e1761718 100644
--- a/backend/src/middleware/hashtags/extractHashtags.spec.js
+++ b/backend/src/middleware/hashtags/extractHashtags.spec.js
@@ -31,7 +31,11 @@ describe('extractHashtags', () => {
         // Allowed are all unicode letters '\pL' and all digits '0-9'. There haveto be at least one letter in it.
         const content =
           '<p>Something inspirational about <a href="/search/hashtag/AbcDefXyz0123456789!*(),2" class="hashtag" target="_blank">#AbcDefXyz0123456789!*(),2</a>, <a href="/search/hashtag/0123456789" class="hashtag" target="_blank">#0123456789</a>, <a href="/search/hashtag/0123456789a" class="hashtag" target="_blank">#0123456789a</a>, <a href="/search/hashtag/AbcDefXyz0123456789" target="_blank">#AbcDefXyz0123456789</a>, and <a href="/search/hashtag/λαπ" target="_blank">#λαπ</a>.</p>'
-        expect(extractHashtags(content).sort()).toEqual(['0123456789a', 'AbcDefXyz0123456789', 'λαπ'])
+        expect(extractHashtags(content).sort()).toEqual([
+          '0123456789a',
+          'AbcDefXyz0123456789',
+          'λαπ',
+        ])
       })
     })
 
@@ -55,4 +59,4 @@ describe('extractHashtags', () => {
       })
     })
   })
-})
\ No newline at end of file
+})
diff --git a/backend/yarn.lock b/backend/yarn.lock
index 2829dc9d0..2ac69e7b3 100644
--- a/backend/yarn.lock
+++ b/backend/yarn.lock
@@ -752,7 +752,7 @@
   resolved "https://registry.yarnpkg.com/@hapi/hoek/-/hoek-8.2.1.tgz#924af04cbb22e17359c620d2a9c946e63f58eb77"
   integrity sha512-JPiBy+oSmsq3St7XlipfN5pNA6bDJ1kpa73PrK/zR29CVClDVqy04AanM/M/qx5bSF+I61DdCfAvRrujau+zRg==
 
-"@hapi/joi@^15.0.3", "@hapi/joi@^15.1.0", "@hapi/joi@^15.1.1":
+"@hapi/joi@^15.1.0", "@hapi/joi@^15.1.1":
   version "15.1.1"
   resolved "https://registry.yarnpkg.com/@hapi/joi/-/joi-15.1.1.tgz#c675b8a71296f02833f8d6d243b34c57b8ce19d7"
   integrity sha512-entf8ZMOK8sc+8YfeOlM8pCfg3b5+WZIKBfUaaJT8UsjAAPjartzxIYm3TIbjvA4u+u++KbcXD38k682nVHDAQ==
@@ -7311,7 +7311,7 @@ request-promise-native@^1.0.5:
     stealthy-require "^1.1.1"
     tough-cookie "^2.3.3"
 
-request@^2.61.0, request@^2.87.0, request@^2.88.0, request@~2.88.0:
+request@^2.61.0, request@^2.87.0, request@~2.88.0:
   version "2.88.0"
   resolved "https://registry.yarnpkg.com/request/-/request-2.88.0.tgz#9c2fca4f7d35b592efe57c7f0a55e81052124fef"
   integrity sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==
@@ -7447,11 +7447,6 @@ run-async@^2.2.0:
   dependencies:
     is-promise "^2.1.0"
 
-rx@^4.1.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/rx/-/rx-4.1.0.tgz#a5f13ff79ef3b740fe30aa803fb09f98805d4782"
-  integrity sha1-pfE/957zt0D+MKqAP7CfmIBdR4I=
-
 rxjs@^6.4.0:
   version "6.5.2"
   resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.5.2.tgz#2e35ce815cd46d84d02a209fb4e5921e051dbec7"
@@ -8669,17 +8664,6 @@ w3c-hr-time@^1.0.1:
   dependencies:
     browser-process-hrtime "^0.1.2"
 
-wait-on@~3.3.0:
-  version "3.3.0"
-  resolved "https://registry.yarnpkg.com/wait-on/-/wait-on-3.3.0.tgz#9940981d047a72a9544a97b8b5fca45b2170a082"
-  integrity sha512-97dEuUapx4+Y12aknWZn7D25kkjMk16PbWoYzpSdA8bYpVfS6hpl2a2pOWZ3c+Tyt3/i4/pglyZctG3J4V1hWQ==
-  dependencies:
-    "@hapi/joi" "^15.0.3"
-    core-js "^2.6.5"
-    minimist "^1.2.0"
-    request "^2.88.0"
-    rx "^4.1.0"
-
 walker@^1.0.7, walker@~1.0.5:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/walker/-/walker-1.0.7.tgz#2f7f9b8fd10d677262b18a884e28d19618e028fb"