diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index bbd0a949..090a5530 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,4 +15,4 @@ jobs:
         with:
           java-version: 1.8
       - name: Build with Gradle
-        run: ./gradlew build -Prelease
+        run: ./gradlew build -Prelease -PCI
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 5ec4cab8..b6b7c085 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -14,4 +14,4 @@ jobs:
         with:
           java-version: 1.8
       - name: Build with Gradle
-        run: ./gradlew build
+        run: ./gradlew build -PCI
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b705150c..2f91bcb7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-# $SNAPSHOT;
+# SNAPSHOT
 
 #### Added
 * `core` - `MovementMethodPlugin.none()`, `MovementMethodPlugin.link()` factory methods
diff --git a/app-sample/build.gradle b/app-sample/build.gradle
index 8b838383..38358d30 100644
--- a/app-sample/build.gradle
+++ b/app-sample/build.gradle
@@ -57,6 +57,11 @@ android {
     signingConfigs {
         config {
 
+            // skip signing in CI environment
+            if (project.hasProperty('CI')) {
+                return
+            }
+
             final def keystoreFile = project.file('keystore.jks')
             final def keystoreFilePassword = 'MARKWON_KEYSTORE_FILE_PASSWORD'
             final def keystoreAlias = 'MARKWON_KEY_ALIAS'
@@ -84,6 +89,15 @@ android {
             keyPassword project[keystoreAliasPassword]
         }
     }
+
+    buildTypes {
+        debug {
+            signingConfig signingConfigs.config
+        }
+        release {
+            signingConfig signingConfigs.config
+        }
+    }
 }
 
 kapt {
diff --git a/build.gradle b/build.gradle
index 7394e5d0..d91e7953 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,8 +6,8 @@ buildscript {
     }
     dependencies {
         // on `3.5.3` tests are not run from CLI
-        classpath 'com.android.tools.build:gradle:4.0.0'
-        classpath 'com.github.ben-manes:gradle-versions-plugin:0.27.0'
+        classpath 'com.android.tools.build:gradle:4.0.1'
+        classpath 'com.github.ben-manes:gradle-versions-plugin:0.28.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
@@ -35,7 +35,7 @@ task clean(type: Delete) {
 }
 
 wrapper {
-    gradleVersion '5.5.1'
+    gradleVersion '6.1.1'
     distributionType 'all'
 }