diff --git a/buildSrc/build.gradle b/buildSrc/build.gradle
new file mode 100644
index 0000000000..2f036797bc
--- /dev/null
+++ b/buildSrc/build.gradle
@@ -0,0 +1,7 @@
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile "com.google.guava:guava:19.0"
+}
diff --git a/buildSrc/src/main/groovy/CanonicalizerPlugin.groovy b/buildSrc/src/main/groovy/CanonicalizerPlugin.groovy
index 0540487316..6b6b87b483 100644
--- a/buildSrc/src/main/groovy/CanonicalizerPlugin.groovy
+++ b/buildSrc/src/main/groovy/CanonicalizerPlugin.groovy
@@ -1,8 +1,12 @@
+import com.google.common.io.ByteStreams
 import org.gradle.api.*
-
 import java.util.zip.ZipEntry
 import java.util.zip.ZipFile
 import java.util.zip.ZipOutputStream
+import java.nio.file.Files
+import java.nio.file.attribute.FileTime
+import java.nio.file.Paths
+import java.nio.file.StandardCopyOption
 
 // Custom Gradle plugin that attempts to make the resulting jar file deterministic.
 // Ie. same contract definition should result when compiled in same jar file.
diff --git a/contracts/build.gradle b/contracts/build.gradle
index ab7ef1953e..05d7bee07d 100644
--- a/contracts/build.gradle
+++ b/contracts/build.gradle
@@ -1,23 +1,3 @@
-import com.google.common.io.ByteStreams
-
-import java.nio.file.Files
-import java.nio.file.Paths
-import java.nio.file.StandardCopyOption
-import java.nio.file.attribute.FileTime
-import java.util.zip.ZipEntry
-import java.util.zip.ZipFile
-import java.util.zip.ZipOutputStream
-
-buildscript {
-    repositories {
-        mavenCentral()
-    }
-
-    dependencies {
-        classpath "com.google.guava:guava:19.0"
-    }
-}
-
 apply plugin: 'kotlin'
 apply plugin: CanonicalizerPlugin
 
diff --git a/contracts/isolated/build.gradle b/contracts/isolated/build.gradle
index 2de6c2c765..7e5dd359fa 100644
--- a/contracts/isolated/build.gradle
+++ b/contracts/isolated/build.gradle
@@ -1,23 +1,3 @@
-import com.google.common.io.ByteStreams
-
-import java.nio.file.Files
-import java.nio.file.Paths
-import java.nio.file.StandardCopyOption
-import java.nio.file.attribute.FileTime
-import java.util.zip.ZipEntry
-import java.util.zip.ZipFile
-import java.util.zip.ZipOutputStream
-
-buildscript {
-    repositories {
-        mavenCentral()
-    }
-
-    dependencies {
-        classpath "com.google.guava:guava:19.0"
-    }
-}
-
 apply plugin: 'kotlin'
 apply plugin: CanonicalizerPlugin