diff --git a/gradle.properties b/gradle.properties
index 1f9baa8..279b5f0 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -12,8 +12,6 @@ jfreechart.version = 1.5.2
 batik.version = 1.14
 junit.version = 5.8.1
 junit4.version = 4.13.2
-groovy.version = 3.0.9
-spock.version = 2.0-groovy-3.0
 cglib.version = 3.3.0
 objenesis.version = 2.6
 log4j.version = 2.14.0
diff --git a/graphics-pdfbox-groovy/gradle.properties b/graphics-pdfbox-groovy/gradle.properties
new file mode 100644
index 0000000..720dde5
--- /dev/null
+++ b/graphics-pdfbox-groovy/gradle.properties
@@ -0,0 +1,2 @@
+groovy.version = 2.5.12
+spock.version = 2.0-groovy-2.5