diff --git a/Blade.wiki b/Blade.wiki
index 3f50add..d6dcd97 160000
--- a/Blade.wiki
+++ b/Blade.wiki
@@ -1 +1 @@
-Subproject commit 3f50add3973dc448f8d238ec85b878475e4f0ec7
+Subproject commit d6dcd97e1c7ffcc5397fee268511b2a1eb1d685a
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2b6f6bf..668823f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 Change Log
 ==========
 
+Version 2.5.1 *(2016-12-26)*
+----------------------------
+
+ * Change: Configuration file is now required
+
 Version 2.5.0 *(2016-12-26)*
 ----------------------------
 
diff --git a/gradle.properties b/gradle.properties
index 97d2960..5a4b33f 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -3,7 +3,7 @@ org.gradle.jvmargs=-Xmx1536M
 
 LIB_GROUP_ID = eu.f3rog.blade
 ARTIFACT_ID = none
-LIB_VERSION = 2.5.0
+LIB_VERSION = 2.5.1
 
 LIB_VERSION_DESC = Android Library for Boilerplate Destruction
 
diff --git a/plugin/src/main/groovy/eu/f3rog/blade/plugin/BladePlugin.groovy b/plugin/src/main/groovy/eu/f3rog/blade/plugin/BladePlugin.groovy
index f8bc61d..ccf1a0a 100644
--- a/plugin/src/main/groovy/eu/f3rog/blade/plugin/BladePlugin.groovy
+++ b/plugin/src/main/groovy/eu/f3rog/blade/plugin/BladePlugin.groovy
@@ -16,7 +16,7 @@ public final class BladePlugin
         // non-debug by default
         public boolean debug = false
         // include all modules by default
-        public String[] modules = LIB_MODULES
+        public String[] modules = []
 
         @Override
         public String toString() {
@@ -28,10 +28,11 @@ public final class BladePlugin
     public static String ERROR_GRADLE_TOOLS_1_5_0_REQUIRED = "Blade plugin only supports android gradle plugin 1.5.0 or later!"
     public static String ERROR_ANDROID_PLUGIN_REQUIRED = "'com.android.application' or 'com.android.library' plugin required!"
     public static String ERROR_MODULE_DOES_NOT_EXIST = "Blade does not have module '%s'!"
-    public static String ERROR_APT_MISSING = "Apply apt plugin or update gradle plugin to >=2.2.0!"
+    public static String ERROR_APT_IS_MISSING = "Apply apt plugin or update gradle plugin to >=2.2.0!"
+    public static String ERROR_CONFIG_FILE_IS_MISSING = "Blade configuration file is missing! (more info here: https://github.com/FrantisekGazo/Blade/wiki#1-create-configuration-file)"
 
     public static String LIB_GROUP_ID = "eu.f3rog.blade"
-    public static String LIB_VERSION = "2.5.0"
+    public static String LIB_VERSION = "2.5.1"
     public static String LIB_CONFIG_FILE_NAME = "blade"
     public static String[] LIB_MODULES = ["arg", "extra", "mvp", "parcel", "state"]
 
@@ -83,7 +84,7 @@ public final class BladePlugin
         } else if (hasAnnotationProcessorConfiguration) {
             return ['annotationProcessor', 'androidTestAnnotationProcessor']
         } else {
-            throw new IllegalStateException(ERROR_APT_MISSING)
+            throw new IllegalStateException(ERROR_APT_IS_MISSING)
         }
     }
 
@@ -122,6 +123,8 @@ public final class BladePlugin
         } else if (yamlConfigFile.exists()) {
             Yaml yaml = new Yaml()
             mConfig = yaml.loadAs(new FileInputStream(yamlConfigFile), BladeConfig.class)
+        } else {
+            throw new IllegalStateException(ERROR_CONFIG_FILE_IS_MISSING)
         }
 
         // check module names
diff --git a/plugin/src/test/groovy/eu/f3rog/blade/plugin/BladePluginSpecification.groovy b/plugin/src/test/groovy/eu/f3rog/blade/plugin/BladePluginSpecification.groovy
index 126bca9..29a1b08 100644
--- a/plugin/src/test/groovy/eu/f3rog/blade/plugin/BladePluginSpecification.groovy
+++ b/plugin/src/test/groovy/eu/f3rog/blade/plugin/BladePluginSpecification.groovy
@@ -124,12 +124,40 @@ final class BladePluginSpecification
 
         then:
         e != null
-        e.getMessage().contains(BladePlugin.ERROR_APT_MISSING)
+        e.getMessage().contains(BladePlugin.ERROR_APT_IS_MISSING)
 
         where:
         [gradleToolsVersion, gradleVersion, _, _, bladeFileType] << WHERE_DATA[0..1] + WHERE_DATA[3..4]
     }
 
+    @Unroll
+    def "fail without blade file - for #gradleToolsVersion"() {
+        given:
+        projectFolder.addGradleFile(new GradleConfig()
+                .classpaths([buildGradleClasspath(gradleToolsVersion)] + aptClasspath + [bladeClasspath])
+                .plugins(["com.android.application"] + apt + ["blade"])
+        )
+
+        when:
+        Exception e = null
+        try {
+            GradleRunner.create()
+                    .withGradleVersion(gradleVersion)
+                    .withProjectDir(projectFolder.root)
+                    .withArguments(':build')
+                    .build()
+        } catch (Exception ex) {
+            e = ex
+        }
+
+        then:
+        e != null
+        e.getMessage().contains(BladePlugin.ERROR_CONFIG_FILE_IS_MISSING)
+
+        where:
+        [gradleToolsVersion, gradleVersion, aptClasspath, apt, _] << WHERE_DATA[0..2]
+    }
+
     @Unroll
     def "add correct dependencies - for #gradleToolsVersion, #bladeFileType"() {
         given:
@@ -163,31 +191,6 @@ final class BladePluginSpecification
         [gradleToolsVersion, gradleVersion, aptClasspath, apt, bladeFileType] << WHERE_DATA
     }
 
-    @Unroll
-    def "build successfully without blade file - for #gradleToolsVersion"() {
-        given:
-        projectFolder.addGradleFile(new GradleConfig()
-                .classpaths([buildGradleClasspath(gradleToolsVersion)] + aptClasspath + [bladeClasspath])
-                .plugins(["com.android.application"] + apt + ["blade"])
-                .dependencies(["compile 'com.google.dagger:dagger:2.0.2'"]) // required for 'mvp' module
-        )
-
-        when:
-        BuildResult result = GradleRunner.create()
-                .withGradleVersion(gradleVersion)
-                .withProjectDir(projectFolder.root)
-                .withArguments(':build')
-                .build()
-
-        then:
-        result.task(":build").outcome == SUCCESS
-        result.task(":transformClassesWithBladeForDebug").outcome == SUCCESS
-        result.task(":transformClassesWithBladeForRelease").outcome == SUCCESS
-
-        where:
-        [gradleToolsVersion, gradleVersion, aptClasspath, apt, _] << WHERE_DATA[0..2]
-    }
-
     @Unroll
     def "build successfully [EXTRA, arg] modules - for #gradleToolsVersion, #bladeFileType"() {
         given: