diff --git a/src/main/resources/com/seitenbau/jenkins/plugins/dynamicparameter/StringParameterDefinition/index.jelly b/src/main/resources/com/seitenbau/jenkins/plugins/dynamicparameter/StringParameterDefinition/index.jelly
index ed23855..7a96b3a 100644
--- a/src/main/resources/com/seitenbau/jenkins/plugins/dynamicparameter/StringParameterDefinition/index.jelly
+++ b/src/main/resources/com/seitenbau/jenkins/plugins/dynamicparameter/StringParameterDefinition/index.jelly
@@ -20,10 +20,10 @@ limitations under the License.
     <div name="parameter" description="${it.description}">
       <input type="hidden" name="name" value="${it.name}" />
       <j:if test="${it.readonlyInputField}">
-        <f:textbox name="value" value="${it.defaultValue}" readonly="readonly" disabled="disabled"/>
+        <f:textarea name="value" value="${it.defaultValue}" readonly="readonly" disabled="disabled"/>
       </j:if>
       <j:if test="${!it.readonlyInputField}">
-        <f:textbox name="value" value="${it.defaultValue}" />
+        <f:textarea name="value" value="${it.defaultValue}" />
       </j:if>
       <!--<f:textbox name="value" />-->
     </div>
diff --git a/src/main/resources/com/seitenbau/jenkins/plugins/dynamicparameter/scriptler/ScriptlerStringParameterDefinition/index.jelly b/src/main/resources/com/seitenbau/jenkins/plugins/dynamicparameter/scriptler/ScriptlerStringParameterDefinition/index.jelly
index ed23855..7a96b3a 100644
--- a/src/main/resources/com/seitenbau/jenkins/plugins/dynamicparameter/scriptler/ScriptlerStringParameterDefinition/index.jelly
+++ b/src/main/resources/com/seitenbau/jenkins/plugins/dynamicparameter/scriptler/ScriptlerStringParameterDefinition/index.jelly
@@ -20,10 +20,10 @@ limitations under the License.
     <div name="parameter" description="${it.description}">
       <input type="hidden" name="name" value="${it.name}" />
       <j:if test="${it.readonlyInputField}">
-        <f:textbox name="value" value="${it.defaultValue}" readonly="readonly" disabled="disabled"/>
+        <f:textarea name="value" value="${it.defaultValue}" readonly="readonly" disabled="disabled"/>
       </j:if>
       <j:if test="${!it.readonlyInputField}">
-        <f:textbox name="value" value="${it.defaultValue}" />
+        <f:textarea name="value" value="${it.defaultValue}" />
       </j:if>
       <!--<f:textbox name="value" />-->
     </div>