diff --git a/doc/contributing/plugin_api.rst b/doc/contributing/plugin_api.rst
index 188de537d..2422eea27 100644
--- a/doc/contributing/plugin_api.rst
+++ b/doc/contributing/plugin_api.rst
@@ -23,7 +23,7 @@ the plugin:
 
 The communication between both applications is provided by `Django
 signals
-<https://docs.djangoproject.com/en/1.9/topics/signals/>`_.
+<https://docs.djangoproject.com/en/2.2/topics/signals/>`_.
 
 The following subsections describe the plugin architecture and explain
 how you can create your own.
diff --git a/frontend/package.json b/frontend/package.json
index ada67c08d..746372a1f 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -33,7 +33,7 @@
     "@vue/cli-service": "~4.5.0",
     "@vue/eslint-config-standard": "^5.1.2",
     "@vue/test-utils": "^1.0.3",
-    "axios": "^0.21.1",
+    "axios": "^0.21.2",
     "babel-eslint": "^10.1.0",
     "chai": "^4.1.2",
     "easygettext": "^2.15.0",
diff --git a/frontend/yarn.lock b/frontend/yarn.lock
index d31320f95..d3b8b450e 100644
--- a/frontend/yarn.lock
+++ b/frontend/yarn.lock
@@ -2109,12 +2109,12 @@ aws4@^1.8.0:
   resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.11.0.tgz#d61f46d83b2519250e2784daf5b09479a8b41c59"
   integrity sha512-xh1Rl34h6Fi1DC2WWKfxUTVqRsNnr6LsKz2+hfwDxQJWmrx8+c7ylaqBMcHfl1U1r2dsifOvKX3LQuLNZ+XSvA==
 
-axios@^0.21.1:
-  version "0.21.1"
-  resolved "https://registry.yarnpkg.com/axios/-/axios-0.21.1.tgz#22563481962f4d6bde9a76d516ef0e5d3c09b2b8"
-  integrity sha512-dKQiRHxGD9PPRIUNIWvZhPTPpl1rf/OxTYKsqKUDjBwYylTvV7SjSHJb9ratfyzM6wCdLCOYLzs73qpg5c4iGA==
+axios@^0.21.2:
+  version "0.21.2"
+  resolved "https://registry.yarnpkg.com/axios/-/axios-0.21.2.tgz#21297d5084b2aeeb422f5d38e7be4fbb82239017"
+  integrity sha512-87otirqUw3e8CzHTMO+/9kh/FSgXt/eVDvipijwDtEuwbkySWZ9SBm6VEubmJ/kLKEoLQV/POhxXFb66bfekfg==
   dependencies:
-    follow-redirects "^1.10.0"
+    follow-redirects "^1.14.0"
 
 babel-eslint@^10.1.0:
   version "10.1.0"
@@ -4591,10 +4591,10 @@ flush-write-stream@^1.0.0:
     inherits "^2.0.3"
     readable-stream "^2.3.6"
 
-follow-redirects@^1.0.0, follow-redirects@^1.10.0:
-  version "1.14.1"
-  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.14.1.tgz#d9114ded0a1cfdd334e164e6662ad02bfd91ff43"
-  integrity sha512-HWqDgT7ZEkqRzBvc2s64vSZ/hfOceEol3ac/7tKwzuvEyWx3/4UegXh5oBOIotkGsObyk3xznnSRVADBgWSQVg==
+follow-redirects@^1.0.0, follow-redirects@^1.14.0:
+  version "1.14.4"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.14.4.tgz#838fdf48a8bbdd79e52ee51fb1c94e3ed98b9379"
+  integrity sha512-zwGkiSXC1MUJG/qmeIFH2HBJx9u0V46QGUe3YR1fXG8bXQxq7fLj0RjLZQ5nubr9qNJUZrH+xUcwXEoXNpfS+g==
 
 for-in@^1.0.2:
   version "1.0.2"