diff --git a/samples/standalone/dsl/http-server/build.gradle b/samples/standalone/dsl/http-server/build.gradle
index 6df0928741..959f3ebdd8 100644
--- a/samples/standalone/dsl/http-server/build.gradle
+++ b/samples/standalone/dsl/http-server/build.gradle
@@ -9,6 +9,7 @@ buildscript {
 	}
 // end::repos[]
 	dependencies {
+		classpath 'org.codehaus.groovy:groovy-all:2.5.0-beta-1'
 		classpath "org.springframework.boot:spring-boot-gradle-plugin:2.0.0.BUILD-SNAPSHOT"
 		classpath "org.springframework.cloud:spring-cloud-contract-gradle-plugin:${findProperty('verifierVersion') ?: verifierVersion}"
 	}
diff --git a/spring-cloud-contract-spec/src/main/groovy/org/springframework/cloud/contract/spec/internal/PatternValueDslProperty.groovy b/spring-cloud-contract-spec/src/main/groovy/org/springframework/cloud/contract/spec/internal/PatternValueDslProperty.groovy
index d8054ca59d..6f98c5c630 100644
--- a/spring-cloud-contract-spec/src/main/groovy/org/springframework/cloud/contract/spec/internal/PatternValueDslProperty.groovy
+++ b/spring-cloud-contract-spec/src/main/groovy/org/springframework/cloud/contract/spec/internal/PatternValueDslProperty.groovy
@@ -36,7 +36,8 @@ abstract class PatternValueDslProperty<T extends DslProperty> {
 	protected abstract T createProperty(Pattern pattern, Object generatedValue)
 	
 	T anyAlphaUnicode() {
-		return createAndValidateProperty(RegexPatterns.ONLY_ALPHA_UNICODE, randomString(20))
+		return createAndValidateProperty(RegexPatterns.ONLY_ALPHA_UNICODE,
+				RandomStringGenerator.randomString(20))
 	}
 
 	T anyNumber() {
@@ -88,26 +89,16 @@ abstract class PatternValueDslProperty<T extends DslProperty> {
 	}
 
 	T anyNonBlankString() {
-		return createAndValidateProperty(RegexPatterns.NON_BLANK, randomString(20))
+		return createAndValidateProperty(RegexPatterns.NON_BLANK,
+				RandomStringGenerator.randomString(20))
 	}
 
 	T anyNonEmptyString() {
-		return createAndValidateProperty(RegexPatterns.NON_EMPTY, randomString(20))
+		return createAndValidateProperty(RegexPatterns.NON_EMPTY,
+				RandomStringGenerator.randomString(20))
 	}
 
 	T anyOf(String... values){
 		return createAndValidateProperty(RegexPatterns.anyOf(values), values[0])
 	}
-
-	private static String randomString(int length) {
-		char[] characterSet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray()
-		Random random = new Random()
-		char[] result = new char[length]
-		for (int i = 0; i < result.length; i++) {
-			// picks a random index out of character set > random character
-			int randomCharIndex = random.nextInt(characterSet.length)
-			result[i] = characterSet[randomCharIndex]
-		}
-		return new String(result)
-	}
 }
diff --git a/spring-cloud-contract-spec/src/main/groovy/org/springframework/cloud/contract/spec/internal/RandomStringGenerator.java b/spring-cloud-contract-spec/src/main/groovy/org/springframework/cloud/contract/spec/internal/RandomStringGenerator.java
new file mode 100644
index 0000000000..0cddf8713b
--- /dev/null
+++ b/spring-cloud-contract-spec/src/main/groovy/org/springframework/cloud/contract/spec/internal/RandomStringGenerator.java
@@ -0,0 +1,17 @@
+package org.springframework.cloud.contract.spec.internal;
+
+import java.util.Random;
+
+class RandomStringGenerator {
+	static String randomString(int length) {
+		char[] characterSet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();
+		Random random = new Random();
+		char[] result = new char[length];
+		for (int i = 0; i < result.length; i++) {
+			// picks a random index out of character set > random character
+			int randomCharIndex = random.nextInt(characterSet.length);
+			result[i] = characterSet[randomCharIndex];
+		}
+		return new String(result);
+	}
+}