diff --git a/fints4javaAndroidApp/build.gradle b/fints4javaAndroidApp/build.gradle
index 30183272..dc939f11 100644
--- a/fints4javaAndroidApp/build.gradle
+++ b/fints4javaAndroidApp/build.gradle
@@ -23,6 +23,16 @@ android {
         }
     }
 
+    signingConfigs {
+        debug {
+            // so that all machines have the same signing key, no matter if app is installed from developer's machine or from Jenkins
+            storeFile file('debug-keystore.jks')
+            storePassword 'find_my_bugs_before_releasing_me'
+            keyAlias 'DebugKey'
+            keyPassword 'find_my_bugs_before_releasing_me'
+        }
+    }
+
 }
 
 dependencies {
diff --git a/fints4javaAndroidApp/debug-keystore.jks b/fints4javaAndroidApp/debug-keystore.jks
new file mode 100644
index 00000000..0809a56d
Binary files /dev/null and b/fints4javaAndroidApp/debug-keystore.jks differ