diff --git a/README.md b/README.md
index 60289e79..88cdc9b8 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ You can find technical documentation in the [doc] folder.  Also check out the [W
 
 ## Building
 
-You need JDK 11 (newer versions may not work).  After installing that and setting up the appropriate paths, just type
+You need a JDK version between 11 and 17 inclusive.  Nnewer versions may not work.  After installing that and setting up the appropriate paths, just type
 
 ```
 ./gradlew clean assemble
diff --git a/gradle.properties b/gradle.properties
index a877fa87..6d589c74 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,7 +1,7 @@
 group         = com.muwire
 version       = 0.8.10
 i2pVersion    = 1.6.1
-groovyVersion = 3.0.8
+groovyVersion = 3.0.9
 griffonVersion= 2.15.1
 slf4jVersion  = 1.7.25
 spockVersion  = 1.1-groovy-2.4
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index ffed3a25..84d1f85f 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists