diff --git a/Dockerfile b/Dockerfile
index f08b39b..a0f6fef 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # ================ PYTHON
-FROM python:3.9.0
+FROM python:3.9.7
 
 # System setup:
 RUN apt-get update \
@@ -12,11 +12,11 @@ RUN pip install --upgrade pip
 RUN pip install pip-tools
 
 # ================ JAVASCRIPT
-# The following taken from https://github.com/nodejs/docker-node/blob/master/12/buster/Dockerfile
+# The following taken from https://github.com/nodejs/docker-node/blob/main/14/buster/Dockerfile
 RUN groupadd --gid 1000 node \
   && useradd --uid 1000 --gid node --shell /bin/bash --create-home node
 
-ENV NODE_VERSION 14.15.1
+ENV NODE_VERSION 14.18.1
 
 RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
   && case "${dpkgArch##*-}" in \
@@ -33,6 +33,7 @@ RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
   && for key in \
     4ED778F539E3634C779C87C6D7062848A1AB005C \
     94AE36675C464D64BAFA68DD7434390BDBE9B9C5 \
+    74F12602B6F1C4E913FAA37AD3A89613643B6201 \
     71DCFD284A79C3B38668286BC97EC7A07EDE3FC1 \
     8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600 \
     C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8 \
@@ -42,9 +43,8 @@ RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
     108F52B48DB57BB0CC439B2997B01419BD92F80A \
     B9E2F5981AA6E0CD28160D9FF13993A75599653C \
   ; do \
-    gpg --batch --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys "$key" || \
-    gpg --batch --keyserver hkp://ipv4.pool.sks-keyservers.net --recv-keys "$key" || \
-    gpg --batch --keyserver hkp://pgp.mit.edu:80 --recv-keys "$key" ; \
+    gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$key" || \
+    gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$key" ; \
   done \
   && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-$ARCH.tar.xz" \
   && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
@@ -57,15 +57,14 @@ RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
   && node --version \
   && npm --version
 
-ENV YARN_VERSION 1.22.5
+ENV YARN_VERSION 1.22.15
 
 RUN set -ex \
   && for key in \
     6A010C5166006599AA17F08146C2130DFD2497F5 \
   ; do \
-    gpg --batch --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys "$key" || \
-    gpg --batch --keyserver hkp://ipv4.pool.sks-keyservers.net --recv-keys "$key" || \
-    gpg --batch --keyserver hkp://pgp.mit.edu:80 --recv-keys "$key" ; \
+    gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$key" || \
+    gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$key" ; \
   done \
   && curl -fsSLO --compressed "https://yarnpkg.com/downloads/$YARN_VERSION/yarn-v$YARN_VERSION.tar.gz" \
   && curl -fsSLO --compressed "https://yarnpkg.com/downloads/$YARN_VERSION/yarn-v$YARN_VERSION.tar.gz.asc" \