diff --git a/build.xml b/build.xml
index 8992b6de..eacbb4e8 100644
--- a/build.xml
+++ b/build.xml
@@ -28,7 +28,7 @@
   </target>
 
   <target name="-prepare-as" depends="-prepare">
-    <maventaskdef groupId="com.threerings.ant" artifactId="actionscript" version="1.3"/>
+    <maventaskdef groupId="com.threerings.ant" artifactId="actionscript" version="1.4"/>
     <checkflex/> <!-- if flexsdk.dir is not already set, tries to infer it -->
     <if><not><isset property="flexsdk.dir"/></not><then>
       <echo>***</echo>
@@ -115,7 +115,7 @@
   </target>
 
   <target name="asdoc" depends="-prepare" description="Builds ActionScript docs.">
-    <maventaskdef groupId="com.threerings.ant" artifactId="actionscript" version="1.0"/>
+    <maventaskdef groupId="com.threerings.ant" artifactId="actionscript" version="1.4"/>
     <mkdir dir="${deploy.dir}/asdocs"/>
     <asdoc srcdir="${asrc.dir}" libpath="${aslib.path}" destdir="${deploy.dir}/asdocs"/>
   </target>