diff --git a/extras/src/main/java/edu/umd/cs/piccolox/nodes/PShadow.java b/extras/src/main/java/edu/umd/cs/piccolox/nodes/PShadow.java
index 10a1d1c..a3c5bf3 100755
--- a/extras/src/main/java/edu/umd/cs/piccolox/nodes/PShadow.java
+++ b/extras/src/main/java/edu/umd/cs/piccolox/nodes/PShadow.java
@@ -37,6 +37,8 @@
 
 /**
  * Shadow node.
+ *
+ * @since 1.3
  */
 public final class PShadow extends PImage {
 
diff --git a/extras/src/main/java/edu/umd/cs/piccolox/util/ShadowUtils.java b/extras/src/main/java/edu/umd/cs/piccolox/util/ShadowUtils.java
index 21b65ed..19c9170 100755
--- a/extras/src/main/java/edu/umd/cs/piccolox/util/ShadowUtils.java
+++ b/extras/src/main/java/edu/umd/cs/piccolox/util/ShadowUtils.java
@@ -39,6 +39,8 @@
 
 /**
  * Static utility methods for creating shadows.
+ *
+ * @since 1.3
  */
 public final class ShadowUtils {