diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 000000000..e1fef8e0a
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,25 @@
+# Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>
+
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+
+.git
+.github
+docs
+node_modules
+src
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 05563889c..ab2a967dc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -80,14 +80,14 @@ jobs:
         with:
           python-version: 3.x
 
-      - uses: actions/cache@v1
-        id: cache-python
-        with:
-          path: ~/.cache/pip
-          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+      # - uses: actions/cache@v1
+      #   id: cache-python
+      #   with:
+      #     path: ~/.cache/pip
+      #     key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
 
-      - if: steps.cache-python.outputs.cache-hit != 'true'
-        run: pip install -r requirements.txt
+      # - if: steps.cache-python.outputs.cache-hit != 'true'
+      - run: pip install -r requirements.txt
 
       # Set configuration for repository and deploy documentation
       - env:
@@ -100,8 +100,10 @@ jobs:
           git config --global user.email "${GH_EMAIL}"
           git remote set-url origin ${REMOTE}
 
-      # Install theme
-      - run: python setup.py install
+      # Install theme and dependencies
+      - run: |
+          python setup.py install
+          pip install mkdocs-minify-plugin>=0.2
 
       # Build documentation
       - env:
diff --git a/CHANGELOG b/CHANGELOG
index fa445e05b..3b9df0364 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,8 @@
+mkdocs-material 4.6.3 (2020-02-14)
+
+  * Removed optional third-party plugins from requirements.txt
+  * Updated Docker image to contain all supported third-party plugins
+
 mkdocs-material 4.6.2 (2020-02-08)
 
   * Added Romanian translations
diff --git a/Dockerfile b/Dockerfile
index 935181ce2..5abc28421 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,7 +18,7 @@
 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 # IN THE SOFTWARE.
 
-FROM python:3.6.8-alpine3.9
+FROM python:3.8.1-alpine3.11
 
 # Set build directory
 WORKDIR /tmp
@@ -38,7 +38,10 @@ RUN \
     git-fast-import \
     openssh \
   && python setup.py install \
-  && rm -rf /tmp/*
+  && rm -rf /tmp/* \
+  && pip install --no-cache-dir \
+    'mkdocs-minify-plugin>=0.2' \
+    'mkdocs-git-revision-date-localized-plugin>=0.4'
 
 # Set working directory
 WORKDIR /docs
diff --git a/docs/release-notes.md b/docs/release-notes.md
index b2cd97dc2..19e84bb4e 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -64,6 +64,11 @@ pip show mkdocs-material
 
 ## Changelog
 
+### 4.6.3 <small>_ February 14, 2020</small>
+
+* Removed optional third-party plugins from `requirements.txt`
+* Updated Docker image to contain all supported third-party plugins
+
 ### 4.6.2 <small>_ February 8, 2020</small>
 
 * Added Romanian translations
diff --git a/material/partials/search.html b/material/partials/search.html
index c17d3369b..4742800f3 100644
--- a/material/partials/search.html
+++ b/material/partials/search.html
@@ -6,7 +6,7 @@
   <label class="md-search__overlay" for="__search"></label>
   <div class="md-search__inner" role="search">
     <form class="md-search__form" name="search">
-      <input type="text" class="md-search__input" name="query" placeholder="{{ lang.t('search.placeholder') }}" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="search-query" data-md-state="active" required>
+      <input type="text" class="md-search__input" name="query" aria-label="search" placeholder="{{ lang.t('search.placeholder') }}" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="search-query" data-md-state="active" required>
       <label class="md-icon md-search__icon" for="__search"></label>
       <button type="reset" class="md-icon md-search__icon" data-md-component="search-reset" tabindex="-1">
         &#xE5CD;
diff --git a/package-lock.json b/package-lock.json
index 3075bfbd2..934b28968 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "mkdocs-material",
-  "version": "5.0.0dev0",
+  "version": "5.0.0b1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/requirements.txt b/requirements.txt
index 460bbdb6a..d951f49df 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,6 @@
 
 # Direct dependencies
 mkdocs>=1.0
-mkdocs-minify-plugin>=0.2
-Pygments>=2.2
+Pygments>=2.4
 markdown>=3.2
 pymdown-extensions>=7.0b1
diff --git a/src/partials/search.html b/src/partials/search.html
index f04c9b18d..15c12de38 100644
--- a/src/partials/search.html
+++ b/src/partials/search.html
@@ -31,6 +31,7 @@
         type="text"
         class="md-search__input"
         name="query"
+        aria-label="search"
         placeholder="{{ lang.t('search.placeholder') }}"
         autocapitalize="off"
         autocorrect="off"