diff --git a/.github/workflows/build_and_sign.yml b/.github/workflows/build_and_sign.yml
index 118c0e19a..54fe64c92 100644
--- a/.github/workflows/build_and_sign.yml
+++ b/.github/workflows/build_and_sign.yml
@@ -1,4 +1,4 @@
-name: Android CI
+name: Build Signed Release
 
 on:
   push:
diff --git a/build.gradle b/build.gradle
index 2261339af..9092d910e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -80,17 +80,17 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility = 17
-        targetCompatibility = 17
+        sourceCompatibility = 18
+        targetCompatibility = 18
     }
 
     signingConfigs {
-        if (project.hasProperty('RELEASE_STORE_FILE')) {
+        if (System.getenv('RELEASE_STORE_FILE') != null) {
             release {
-                storeFile file(RELEASE_STORE_FILE)
-                storePassword RELEASE_STORE_PASSWORD
-                keyAlias RELEASE_KEY_ALIAS
-                keyPassword RELEASE_KEY_PASSWORD
+                storeFile file(System.getenv("RELEASE_STORE_FILE"))
+                storePassword System.getenv("RELEASE_STORE_PASSWORD")
+                keyAlias System.getenv("RELEASE_KEY_ALIAS")
+                keyPassword System.getenv("RELEASE_KEY_PASSWORD")
             }
         }
     }
@@ -98,7 +98,7 @@ android {
     buildTypes {
         release {
             buildConfigField "boolean", "ALWAYS_UPGRADE", "false"
-            if (project.hasProperty('RELEASE_STORE_FILE')) {
+            if (System.getenv('RELEASE_STORE_FILE') != null) {
                 signingConfig signingConfigs.release
             }
         }
diff --git a/signing.tar.enc b/signing.tar.enc
deleted file mode 100644
index bb066d27b..000000000
Binary files a/signing.tar.enc and /dev/null differ