diff --git a/src/llvm/llvm_url.ts b/src/llvm/llvm_url.ts
index 3787edd3..d4ed8909 100644
--- a/src/llvm/llvm_url.ts
+++ b/src/llvm/llvm_url.ts
@@ -75,6 +75,8 @@ export const VERSIONS: Set<string> = getVersions([
   "17.0.4",
   "17.0.5",
   "17.0.6",
+  "18.1.0",
+  "18.1.1",
 ])
 
 /** The LLVM versions that were never released for the Windows platform. */
@@ -113,6 +115,8 @@ const DARWIN_MISSING = new Set([
   "17.0.4",
   "17.0.5",
   "17.0.6",
+  "18.1.0",
+  "18.1.1",
 ])
 
 /**
@@ -178,10 +182,12 @@ const UBUNTU_SUFFIX_MAP: { [key: string]: string } = {
   "17.0.4": "-ubuntu-22.04",
   "17.0.5": "-ubuntu-22.04",
   "17.0.6": "-ubuntu-22.04",
+  "18.1.0": "-ubuntu-22.04",
+  "18.1.1": "-ubuntu-22.04",
 }
 
 /** The latest supported LLVM version for the Linux (Ubuntu) platform. */
-const MAX_UBUNTU: string = "17.0.6"
+const MAX_UBUNTU: string = "18.1.1"
 
 //================================================
 // URL
diff --git a/src/versions/default_versions.ts b/src/versions/default_versions.ts
index 0f25232b..43f19a15 100644
--- a/src/versions/default_versions.ts
+++ b/src/versions/default_versions.ts
@@ -6,14 +6,14 @@ import { isArch } from "../utils/env/isArch"
 function getLLVMDefault() {
   switch (process.platform) {
     case "win32":
-      return "17.0.6"
+      return "18.1.1"
     case "linux":
       // used for non-ubuntu (Fedora, Arch)
-      return "17.0.6-ubuntu-22.04"
+      return "18.1.1-ubuntu-22.04"
     case "darwin":
       return "15.0.3"
     default:
-      return "17.0.6"
+      return "18.1.1"
   }
 }
 
@@ -54,23 +54,23 @@ export const DefaultLinuxVersion: Record<string, Record<number, string> | undefi
     20: "7.0.0-2",
   },
   llvm: {
-    22: "17.0.6-ubuntu-22.04",
-    20: "17.0.6-ubuntu-22.04",
-    18: "15.0.6-ubuntu-18.04",
+    22: "18.1.1-ubuntu-22.04",
+    20: "18.1.1-ubuntu-22.04",
+    18: "18.1.1-ubuntu-22.04",
     16: "15.0.6-ubuntu-18.04",
     14: "13.0.0-ubuntu-16.04",
   },
   clangtidy: {
-    22: "17.0.2-ubuntu-22.04",
-    20: "17.0.2-ubuntu-22.04",
-    18: "15.0.6-ubuntu-18.04",
+    22: "18.1.1-ubuntu-22.04",
+    20: "18.1.1-ubuntu-22.04",
+    18: "18.1.1-ubuntu-22.04",
     16: "15.0.6-ubuntu-18.04",
     14: "13.0.0-ubuntu-16.04",
   },
   clangformat: {
-    22: "17.0.2-ubuntu-22.04",
-    20: "17.0.2-ubuntu-22.04",
-    18: "15.0.6-ubuntu-18.04",
+    22: "18.1.1-ubuntu-22.04",
+    20: "18.1.1-ubuntu-22.04",
+    18: "18.1.1-ubuntu-22.04",
     16: "15.0.6-ubuntu-18.04",
     14: "13.0.0-ubuntu-16.04",
   },