Index: trunk/tools/ivy.xml
===================================================================
--- trunk/tools/ivy.xml	(revision 18979)
+++ trunk/tools/ivy.xml	(revision 19048)
@@ -17,8 +17,9 @@
         <dependency org="net.java.dev.javacc" name="javacc" rev="7.0.13" conf="javacc->default"/>
         <!-- checkstyle->default -->
-        <dependency org="com.puppycrawl.tools" name="checkstyle" rev="9.3" conf="checkstyle->default"/>
+        <dependency org="com.puppycrawl.tools" name="checkstyle" rev="10.15.0" conf="checkstyle->default"/>
         <!-- proguard->default -->
         <dependency org="com.guardsquare" name="proguard-ant" rev="7.4.2" conf="proguard->default"/>
         <!-- pmd->default -->
+        <!-- PMD 7.0.0 has too many false positives right now. When updating, don't forget to add pmd-ant as a new dependency -->
         <dependency org="net.sourceforge.pmd" name="pmd-core" rev="6.55.0" conf="pmd->default"/>
         <dependency org="net.sourceforge.pmd" name="pmd-java" rev="6.55.0" conf="pmd->default"/>
@@ -28,10 +29,8 @@
         </dependency>
         <!-- spotbugs->default -->
-        <dependency org="com.github.spotbugs" name="spotbugs" rev="4.8.3" conf="spotbugs->default"/>
-        <dependency org="com.github.spotbugs" name="spotbugs-ant" rev="4.8.3" conf="spotbugs->default"/>
+        <dependency org="com.github.spotbugs" name="spotbugs" rev="4.8.4" conf="spotbugs->default"/>
+        <dependency org="com.github.spotbugs" name="spotbugs-ant" rev="4.8.4" conf="spotbugs->default"/>
         <!-- errorprone->default -->
-        <dependency org="com.google.errorprone" name="error_prone_core" rev="${versions.error_prone}" conf="errorprone->default"/>
-        <!-- errorprone->default -->
-        <dependency org="com.google.errorprone" name="javac" rev="9+181-r4173-1" conf="errorprone_javac->default"/>
+        <dependency org="com.google.errorprone" name="error_prone_core" rev="2.26.1" conf="errorprone->default"/>
         <!-- animal->default -->
         <dependency org="org.codehaus.mojo" name="animal-sniffer-ant-tasks" rev="1.23" conf="animal->default"/>