diff --git a/.buildkite/pipeline.yml b/.buildkite/pipeline.yml
index d53af97b..8fcb69b6 100644
--- a/.buildkite/pipeline.yml
+++ b/.buildkite/pipeline.yml
@@ -45,7 +45,7 @@ steps:
     branches: "master"
     plugins:
       - docker#v3.1.0:
-        image: "runmymind/docker-android-sdk"
+          image: "runmymind/docker-android-sdk"
 
   # Code quality
 
diff --git a/tools/sign_apk.sh b/tools/sign_apk.sh
new file mode 100755
index 00000000..7f421c15
--- /dev/null
+++ b/tools/sign_apk.sh
@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+
+set -e
+
+if [[ -z "${ANDROID_HOME}" ]]; then
+    echo "Env variable ANDROID_HOME is not set, should be set to something like ~/Library/Android/sdk"
+    exit 1
+fi
+
+if [[ "$#" -ne 2 ]]; then
+  echo "Usage: $0 KEYSTORE_PATH APK" >&2
+  exit 1
+fi
+
+# Get the command line parameters
+PARAM_KEYSTORE_PATH=$1
+PARAM_APK=$2
+
+# Other params
+BUILD_TOOLS_VERSION="28.0.3"
+MIN_SDK_VERSION=19
+
+echo "Signing APK with build-tools version ${BUILD_TOOLS_VERSION} for min SDK version ${MIN_SDK_VERSION}..."
+
+APK_SIGNER_PATH=${ANDROID_HOME}/build-tools/${BUILD_TOOLS_VERSION}
+
+${APK_SIGNER_PATH}/apksigner sign \
+    -v \
+    --ks ${PARAM_KEYSTORE_PATH} \
+    --min-sdk-version ${MIN_SDK_VERSION} \
+    ${PARAM_APK}
+
+# Verify the signature
+echo "Verifying the signature..."
+
+# Note: we ignore warning on META-INF files
+${APK_SIGNER_PATH}/apksigner verify \
+    -v \
+    --min-sdk-version ${MIN_SDK_VERSION} \
+    ${PARAM_APK} \
+    | grep -v "WARNING: META-INF/"
+
+echo
+echo "Congratulations! The APK ${PARAM_APK} is now signed!"
diff --git a/vector/build.gradle b/vector/build.gradle
index 7170dfac..b4f27d7e 100644
--- a/vector/build.gradle
+++ b/vector/build.gradle
@@ -12,9 +12,9 @@ androidExtensions {
     experimental = true
 }
 
-def versionMajor = 0
-def versionMinor = 1
-def versionPatch = 0
+ext.versionMajor = 0
+ext.versionMinor = 1
+ext.versionPatch = 0
 
 static def getGitTimestamp() {
     def cmd = 'git show -s --format=%ct'
@@ -63,7 +63,11 @@ android {
         minSdkVersion 19
         targetSdkVersion 28
         multiDexEnabled true
-        versionCode generateVersionCodeFromTimestamp()
+
+        // For release, use generateVersionCodeFromVersionName()
+        // versionCode generateVersionCodeFromTimestamp()
+        versionCode generateVersionCodeFromVersionName()
+
         versionName "${versionMajor}.${versionMinor}.${versionPatch}"
 
         buildConfigField "String", "GIT_REVISION", "\"${gitRevision()}\""