diff --git a/java/kotlin-extractor/BUILD.bazel b/java/kotlin-extractor/BUILD.bazel
index 9882b173c07..0eef645cba0 100644
--- a/java/kotlin-extractor/BUILD.bazel
+++ b/java/kotlin-extractor/BUILD.bazel
@@ -106,7 +106,10 @@ kt_javac_options(
                 "%s/%s" % (v, target)
                 for _, target in _resources
             ] + (
-                ["%s/%s" % (v, _compiler_plugin_registrar_service[1])] if not version_less(v, "2.4.0") else []
+                ["%s/%s" % (
+                    v,
+                    _compiler_plugin_registrar_service[1],
+                )] if not version_less(v, "2.4.0") else []
             ),
             cmd = "\n".join([
                 "echo %s-%s > $(RULEDIR)/%s/com/github/codeql/extractor.name" % (_extractor_name_prefix, v, v),
diff --git a/java/ql/integration-tests/kotlin/all-platforms/enhanced-nullability/test.py b/java/ql/integration-tests/kotlin/all-platforms/enhanced-nullability/test.py
index e030b51db8f..72ff061aa82 100644
--- a/java/ql/integration-tests/kotlin/all-platforms/enhanced-nullability/test.py
+++ b/java/ql/integration-tests/kotlin/all-platforms/enhanced-nullability/test.py
@@ -6,6 +6,6 @@ def test(codeql, java_full):
     codeql.database.create(
         command=[
             f"javac {java_srcs} -d build",
-            "kotlinc -language-version 1.9 user.kt -cp build",
+            "kotlinc -language-version 2.0 user.kt -cp build",
         ]
     )
diff --git a/java/ql/integration-tests/kotlin/all-platforms/external-property-overloads/test.py b/java/ql/integration-tests/kotlin/all-platforms/external-property-overloads/test.py
index 403f3729d06..338ae19a9aa 100644
--- a/java/ql/integration-tests/kotlin/all-platforms/external-property-overloads/test.py
+++ b/java/ql/integration-tests/kotlin/all-platforms/external-property-overloads/test.py
@@ -2,5 +2,5 @@ import commands
 
 
 def test(codeql, java_full):
-    commands.run("kotlinc -language-version 1.9 test.kt -d lib")
-    codeql.database.create(command="kotlinc -language-version 1.9 user.kt -cp lib")
+    commands.run("kotlinc -language-version 2.0 test.kt -d lib")
+    codeql.database.create(command="kotlinc -language-version 2.0 user.kt -cp lib")
diff --git a/java/ql/integration-tests/kotlin/all-platforms/extractor_information_kotlin1/ExtractorInformation.expected b/java/ql/integration-tests/kotlin/all-platforms/extractor_information_kotlin1/ExtractorInformation.expected
index 5e32cd7786e..d00ef5f0ec6 100644
--- a/java/ql/integration-tests/kotlin/all-platforms/extractor_information_kotlin1/ExtractorInformation.expected
+++ b/java/ql/integration-tests/kotlin/all-platforms/extractor_information_kotlin1/ExtractorInformation.expected
@@ -9,4 +9,4 @@
 | Percentage of calls with call target | 100 |
 | Total number of lines | 3 |
 | Total number of lines with extension kt | 3 |
-| Uses Kotlin 2: false | 1 |
+| Uses Kotlin 2: true | 1 |
diff --git a/java/ql/integration-tests/kotlin/all-platforms/extractor_information_kotlin1/test.py b/java/ql/integration-tests/kotlin/all-platforms/extractor_information_kotlin1/test.py
index 5a0dc9e072b..b5bb5378a23 100755
--- a/java/ql/integration-tests/kotlin/all-platforms/extractor_information_kotlin1/test.py
+++ b/java/ql/integration-tests/kotlin/all-platforms/extractor_information_kotlin1/test.py
@@ -1,2 +1,2 @@
 def test(codeql, java_full):
-    codeql.database.create(command="kotlinc -J-Xmx2G -language-version 1.9 SomeClass.kt")
+    codeql.database.create(command="kotlinc -J-Xmx2G -language-version 2.0 SomeClass.kt")
diff --git a/java/ql/integration-tests/kotlin/all-platforms/file_classes/test.py b/java/ql/integration-tests/kotlin/all-platforms/file_classes/test.py
index 99c21ceb0b8..1d0913490f1 100644
--- a/java/ql/integration-tests/kotlin/all-platforms/file_classes/test.py
+++ b/java/ql/integration-tests/kotlin/all-platforms/file_classes/test.py
@@ -2,5 +2,5 @@ import commands
 
 
 def test(codeql, java_full):
-    commands.run("kotlinc -language-version 1.9 A.kt")
-    codeql.database.create(command="kotlinc -cp . -language-version 1.9 B.kt C.kt")
+    commands.run("kotlinc -language-version 2.0 A.kt")
+    codeql.database.create(command="kotlinc -cp . -language-version 2.0 B.kt C.kt")
diff --git a/java/ql/integration-tests/kotlin/all-platforms/java-interface-redeclares-tostring/test.py b/java/ql/integration-tests/kotlin/all-platforms/java-interface-redeclares-tostring/test.py
index 3db804c83be..1f24c2be790 100644
--- a/java/ql/integration-tests/kotlin/all-platforms/java-interface-redeclares-tostring/test.py
+++ b/java/ql/integration-tests/kotlin/all-platforms/java-interface-redeclares-tostring/test.py
@@ -3,4 +3,4 @@ import commands
 
 def test(codeql, java_full):
     commands.run(["javac", "Test.java", "-d", "bin"])
-    codeql.database.create(command="kotlinc -language-version 1.9 user.kt -cp bin")
+    codeql.database.create(command="kotlinc -language-version 2.0 user.kt -cp bin")
diff --git a/java/ql/integration-tests/kotlin/all-platforms/kotlin_java_lowering_wildcards/test.py b/java/ql/integration-tests/kotlin/all-platforms/kotlin_java_lowering_wildcards/test.py
index d1c4948dfe7..b259450e7b9 100644
--- a/java/ql/integration-tests/kotlin/all-platforms/kotlin_java_lowering_wildcards/test.py
+++ b/java/ql/integration-tests/kotlin/all-platforms/kotlin_java_lowering_wildcards/test.py
@@ -8,6 +8,6 @@ def test(codeql, java_full):
         command=[
             "kotlinc kotlindefns.kt",
             "javac JavaUser.java JavaDefns.java -cp .",
-            "kotlinc -language-version 1.9 -cp . kotlinuser.kt",
+            "kotlinc -language-version 2.0 -cp . kotlinuser.kt",
         ]
     )