diff --git a/README.md b/README.md
index 75c4c811..8692f74d 100644
--- a/README.md
+++ b/README.md
@@ -371,7 +371,7 @@ It's really simple to setup this plugin; below is a sample pom that you may base
                       <!-- example: apply replacement only to the specific property git.branch and replace '/' with '-'
                       <replacementProperty>
                         <property>git.branch</property>
-                        <propertyOutputSuffix>something<propertyOutputSuffix>
+                        <propertyOutputSuffix>something</propertyOutputSuffix>
                         <token>^([^\/]*)\/([^\/]*)$</token>
                         <value>$1-$2</value>
                         <regex>true</regex>
diff --git a/pom.xml b/pom.xml
index 74d5a838..39473839 100644
--- a/pom.xml
+++ b/pom.xml
@@ -386,8 +386,15 @@
               <replacementProperties>
                 <replacementProperty>
                   <property>git.branch</property>
+                  <propertyOutputSuffix>something</propertyOutputSuffix>
                   <token>^([^\/]*)\/([^\/]*)$</token>
                   <value>$1-$2</value>
+                  <transformationRules>
+                    <transformationRule>
+                      <apply>BEFORE</apply>
+                      <action>UPPER_CASE</action>
+                    </transformationRule>
+                  </transformationRules>
                 </replacementProperty>
               </replacementProperties>
               <failOnNoGitDirectory>false</failOnNoGitDirectory>
diff --git a/src/main/java/pl/project13/maven/git/TransformationRule.java b/src/main/java/pl/project13/maven/git/TransformationRule.java
index 39386e75..e3b8dc3d 100644
--- a/src/main/java/pl/project13/maven/git/TransformationRule.java
+++ b/src/main/java/pl/project13/maven/git/TransformationRule.java
@@ -89,10 +89,14 @@ public String getApply() {
   }
 
   public void setApply(String apply) {
+    this.applyRule = ApplyEnum.valueOf(apply);
     this.apply = apply;
   }
 
   public ApplyEnum getApplyRule() {
+    if(applyRule == null) {
+      throw new IllegalStateException("The parameter 'apply' for TransformationRule is missing or invalid");
+    }
     return applyRule;
   }
 
@@ -101,10 +105,14 @@ public String getAction() {
   }
 
   public void setAction(String action) {
+    this.actionRule = ActionEnum.valueOf(action);
     this.action = action;
   }
 
   public ActionEnum getActionRule() {
+    if(actionRule == null) {
+      throw new IllegalStateException("The parameter 'action' for TransformationRule is missing or invalid");
+    }
     return actionRule;
   }
 }