diff --git a/java-client/flight-dagger/gradle.properties b/java-client/flight-dagger/gradle.properties
index 9e8588f2620..c186bbfdde1 100644
--- a/java-client/flight-dagger/gradle.properties
+++ b/java-client/flight-dagger/gradle.properties
@@ -1,2 +1 @@
 io.deephaven.project.ProjectType=JAVA_PUBLIC
-languageLevel=8
diff --git a/java-client/flight/gradle.properties b/java-client/flight/gradle.properties
index 9e8588f2620..c186bbfdde1 100644
--- a/java-client/flight/gradle.properties
+++ b/java-client/flight/gradle.properties
@@ -1,2 +1 @@
 io.deephaven.project.ProjectType=JAVA_PUBLIC
-languageLevel=8
diff --git a/java-client/session-dagger/gradle.properties b/java-client/session-dagger/gradle.properties
index 4dfadfbdcf2..c186bbfdde1 100644
--- a/java-client/session-dagger/gradle.properties
+++ b/java-client/session-dagger/gradle.properties
@@ -1,3 +1 @@
 io.deephaven.project.ProjectType=JAVA_PUBLIC
-
-languageLevel=8
diff --git a/java-client/session/gradle.properties b/java-client/session/gradle.properties
index 9e8588f2620..c186bbfdde1 100644
--- a/java-client/session/gradle.properties
+++ b/java-client/session/gradle.properties
@@ -1,2 +1 @@
 io.deephaven.project.ProjectType=JAVA_PUBLIC
-languageLevel=8
diff --git a/proto/proto-backplane-grpc-flight/gradle.properties b/proto/proto-backplane-grpc-flight/gradle.properties
index 9e8588f2620..c186bbfdde1 100644
--- a/proto/proto-backplane-grpc-flight/gradle.properties
+++ b/proto/proto-backplane-grpc-flight/gradle.properties
@@ -1,2 +1 @@
 io.deephaven.project.ProjectType=JAVA_PUBLIC
-languageLevel=8
diff --git a/proto/proto-backplane-grpc/gradle.properties b/proto/proto-backplane-grpc/gradle.properties
index 9e8588f2620..c186bbfdde1 100644
--- a/proto/proto-backplane-grpc/gradle.properties
+++ b/proto/proto-backplane-grpc/gradle.properties
@@ -1,2 +1 @@
 io.deephaven.project.ProjectType=JAVA_PUBLIC
-languageLevel=8