diff --git a/.github/ISSUE_TEMPLATE/general_question.md b/.github/ISSUE_TEMPLATE/general_question.md
index 95a6ac39..780e232e 100644
--- a/.github/ISSUE_TEMPLATE/general_question.md
+++ b/.github/ISSUE_TEMPLATE/general_question.md
@@ -9,7 +9,7 @@ assignees: ""
 <!--
 Thank you for your interest in Obfuscapk.
 
-You can use this issue for anything other than bug reports and feature requests. Please provide as much information as needed to help us answer your question(s).
+You can use this issue for anything other than bug reports and feature requests. Please provide as much information as needed to help us answer your question(s). Please make sure to also check the FAQ at https://github.com/ClaudiuGeorgiu/Obfuscapk/blob/master/FAQ.md as you may find an answer for the most common questions.
 
 NOTE:
     * if you're including code snippets/logs, please format them properly (see https://help.github.com/github/writing-on-github/basic-writing-and-formatting-syntax#quoting-code);
diff --git a/src/Dockerfile b/src/Dockerfile
index c7339a6a..af00dbc5 100644
--- a/src/Dockerfile
+++ b/src/Dockerfile
@@ -1,20 +1,19 @@
-FROM python:3.7.6-slim-stretch
+FROM python:3.8.3-slim-buster
 
 ENV APKTOOL_VERSION="2.4.1"
 ENV ANDROID_HOME="/android-sdk-linux"
-ENV BUILD_TOOLS_VERSION="29.0.2"
+ENV BUILD_TOOLS_VERSION="29.0.3"
 ENV PATH="${PATH}:${ANDROID_HOME}/tools/bin:${ANDROID_HOME}/build-tools/${BUILD_TOOLS_VERSION}"
 
 # Install the needed tools.
 RUN bash -c 'for i in {1..8}; do mkdir -p "/usr/share/man/man$i"; done' && \
-    # Java 8 (needed for apktool and jarsigner).
-    apt update && apt install --no-install-recommends -y openjdk-8-jdk-headless wget unzip && \
+    # Java JDK (needed for apktool and jarsigner).
+    apt update && apt install --no-install-recommends -y openjdk-11-jdk-headless wget unzip && \
     # Android SDK (needed for zipalign).
     mkdir -p "${ANDROID_HOME}" && \
-    wget -q "https://dl.google.com/android/repository/sdk-tools-linux-4333796.zip" && \
-    unzip -q sdk-tools-linux-4333796.zip -d "${ANDROID_HOME}" && \
-    rm sdk-tools-linux-4333796.zip && \
-    yes | sdkmanager "build-tools;${BUILD_TOOLS_VERSION}" && \
+    wget -q "https://dl.google.com/android/repository/commandlinetools-linux-6200805_latest.zip" -O android-sdk.zip && \
+    unzip -q android-sdk.zip -d "${ANDROID_HOME}" && rm android-sdk.zip && \
+    yes | sdkmanager --sdk_root="${ANDROID_HOME}" "build-tools;${BUILD_TOOLS_VERSION}" && \
     # Apktool.
     wget -q "https://raw.githubusercontent.com/iBotPeaches/Apktool/master/scripts/linux/apktool" \
     -O /usr/local/bin/apktool && chmod a+x /usr/local/bin/apktool && \
@@ -24,11 +23,12 @@ RUN bash -c 'for i in {1..8}; do mkdir -p "/usr/share/man/man$i"; done' && \
     apt remove --purge -y wget unzip && \
     apt autoremove --purge -y && apt clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
-# Copy the source code.
-COPY . /Obfuscapk
+# Copy requirements and install.
+COPY ./requirements.txt /Obfuscapk/
+RUN python3 -m pip install --no-cache-dir -r /Obfuscapk/requirements.txt
 
-# Install Python requirements.
-RUN python3.7 -m pip install --no-cache-dir -r /Obfuscapk/requirements.txt
+# Copy the needed files.
+COPY ./obfuscapk/ /Obfuscapk/obfuscapk/
 
 # Set the working directory (to be used when mounting files from the host).
 WORKDIR /workdir
@@ -36,4 +36,6 @@ VOLUME /workidr
 
 # Set the entrypoint to Obfuscapk command line interface.
 ENV PYTHONPATH="/Obfuscapk"
-ENTRYPOINT ["python3.7", "-m", "obfuscapk.cli"]
+
+# Run with -u $(id -u):$(id -g) to avoid file permission issues.
+ENTRYPOINT ["python3", "-m", "obfuscapk.cli"]
diff --git a/src/requirements.txt b/src/requirements.txt
index f205a4a9..5944949f 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -1,5 +1,5 @@
 pycryptodome==3.9.7
 pytest-cov==2.8.1
-tqdm==4.45.0
+tqdm==4.46.0
 virustotal-api==1.1.11
 Yapsy==1.12.2