diff --git a/runtime/src/main/java/dev/cel/runtime/planner/ProgramPlanner.java b/runtime/src/main/java/dev/cel/runtime/planner/ProgramPlanner.java
index d48726cf2..3782d1860 100644
--- a/runtime/src/main/java/dev/cel/runtime/planner/ProgramPlanner.java
+++ b/runtime/src/main/java/dev/cel/runtime/planner/ProgramPlanner.java
@@ -81,11 +81,8 @@ public final class ProgramPlanner {
   private static final String JSON_NAME_EXTENSION = "json_name";
   private static final String SELECT_OPTIMIZATION_EXTENSION = "select_optimization";
 
-  private static final ImmutableMap<String, Version> SUPPORTED_RUNTIME_EXTENSIONS =
-      ImmutableMap.of(
-          CEL_BLOCK_EXTENSION, Version.of(1, 1),
-          JSON_NAME_EXTENSION, Version.of(1, 1),
-          SELECT_OPTIMIZATION_EXTENSION, Version.of(1, 0));
+  private static final ImmutableSet<String> SUPPORTED_RUNTIME_EXTENSIONS =
+      ImmutableSet.of(CEL_BLOCK_EXTENSION, JSON_NAME_EXTENSION, SELECT_OPTIMIZATION_EXTENSION);
 
   private final CelTypeProvider typeProvider;
   private final CelValueProvider valueProvider;
@@ -865,11 +862,8 @@ private static PlannerContext create(CelAbstractSyntaxTree ast, CelOptions optio
           continue;
         }
         Version version = extension.version();
-        Version supportedVersion = SUPPORTED_RUNTIME_EXTENSIONS.get(extension.id());
         checkArgument(
-            supportedVersion != null
-                && version.major() == supportedVersion.major()
-                && version.minor() <= supportedVersion.minor(),
+            SUPPORTED_RUNTIME_EXTENSIONS.contains(extension.id()) && version.major() == 1,
             "unsupported CEL extension: %s@%s.%s",
             extension.id(),
             version.major(),
diff --git a/runtime/src/test/java/dev/cel/runtime/planner/ProgramPlannerTest.java b/runtime/src/test/java/dev/cel/runtime/planner/ProgramPlannerTest.java
index 7921d80b6..4e006cdd4 100644
--- a/runtime/src/test/java/dev/cel/runtime/planner/ProgramPlannerTest.java
+++ b/runtime/src/test/java/dev/cel/runtime/planner/ProgramPlannerTest.java
@@ -355,10 +355,8 @@ public void plan_notSet_throws() {
   @Test
   @TestParameters("{id: 'unknown', major: 1, minor: 0}")
   @TestParameters("{id: 'select_optimization', major: 2, minor: 0}")
-  @TestParameters("{id: 'select_optimization', major: 1, minor: 1}")
   @TestParameters("{id: 'cel_block', major: 0, minor: 0}")
-  @TestParameters("{id: 'cel_block', major: 1, minor: 2}")
-  @TestParameters("{id: 'json_name', major: 1, minor: 2}")
+  @TestParameters("{id: 'json_name', major: 2, minor: 0}")
   public void plan_unsupportedRuntimeExtension_throws(String id, int major, int minor) {
     CelAbstractSyntaxTree ast =
         newAstWithExtensions(
@@ -377,9 +375,9 @@ public void plan_supportedOrNonRuntimeExtensions_succeeds() throws Exception {
     CelAbstractSyntaxTree ast =
         newAstWithExtensions(
             Extension.create("cel_block", Version.of(1, 0), Component.COMPONENT_RUNTIME),
-            Extension.create("cel_block", Version.of(1, 1), Component.COMPONENT_RUNTIME),
-            Extension.create("json_name", Version.of(1, 1), Component.COMPONENT_RUNTIME),
-            Extension.create("select_optimization", Version.of(1, 0), Component.COMPONENT_RUNTIME),
+            Extension.create("cel_block", Version.of(1, 2), Component.COMPONENT_RUNTIME),
+            Extension.create("json_name", Version.of(1, 2), Component.COMPONENT_RUNTIME),
+            Extension.create("select_optimization", Version.of(1, 1), Component.COMPONENT_RUNTIME),
             // Extensions not affecting the runtime are ignored.
             Extension.create("unknown", Version.of(2, 0), Component.COMPONENT_PARSER));
     ProgramPlanner planner =