Prepare next development version.
diff --git a/gradle.properties b/gradle.properties
index 687eeb5..d0158bc 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,7 +1,7 @@
 org.gradle.jvmargs='-Dfile.encoding=UTF-8'
 
 GROUP=com.squareup
-VERSION_NAME=1.7.2
+VERSION_NAME=1.8.0-SNAPSHOT
 
 POM_URL=https://github.com/square/kotlinpoet
 POM_SCM_URL=https://github.com/square/kotlinpoet