diff --git a/packages/tailwindcss-language-server/src/server.ts b/packages/tailwindcss-language-server/src/server.ts
index 99bb98946f010e802c6ea1425a2afe4b692a73bb..7fe1bd9c1362bbf6a9d73e9e81fe7a0585c29893 100644
--- a/packages/tailwindcss-language-server/src/server.ts
+++ b/packages/tailwindcss-language-server/src/server.ts
@@ -177,7 +177,6 @@   }
 }
 
 interface ProjectService {
-  projectConfig: ProjectConfig
   enabled: () => boolean
   enable: () => void
   documentSelector: () => Array<DocumentSelector>
@@ -362,7 +361,6 @@   return patterns
 }
 
 async function createProjectService(
-  projectKey: string,
   projectConfig: ProjectConfig,
   connection: Connection,
   params: InitializeParams,
@@ -1066,7 +1064,6 @@     updateCapabilities()
   }
 
   return {
-    projectConfig,
     enabled() {
       return enabled
     },
@@ -1120,7 +1117,7 @@         return {
           isIncomplete: result.isIncomplete,
           items: result.items.map((item) => ({
             ...item,
-            data: { projectKey, originalData: item.data },
+            data: { projectKey: JSON.stringify(projectConfig), originalData: item.data },
           })),
         }
       }, null)
@@ -1564,7 +1561,6 @@   private initialized = false
   private lspHandlersAdded = false
   private workspaces: Map<string, { name: string; workspaceFsPath: string }>
   private projects: Map<string, ProjectService>
-  private projectCounter: number
   private documentService: DocumentService
   public initializeParams: InitializeParams
   private registrations: Promise<BulkUnregistration>
@@ -1576,7 +1572,6 @@   constructor(private connection: Connection) {
     this.documentService = new DocumentService(this.connection)
     this.workspaces = new Map()
     this.projects = new Map()
-    this.projectCounter = 0
   }
 
   async init(): Promise<void> {
@@ -1759,18 +1754,19 @@         }
 
         let isPackageFile = minimatch(normalizedFilename, `**/${PACKAGE_LOCK_GLOB}`, { dot: true })
         if (isPackageFile) {
-          for (let [, project] of this.projects) {
+          for (let [key] of this.projects) {
+            let projectConfig = JSON.parse(key) as ProjectConfig
             let twVersion = require('tailwindcss/package.json').version
             try {
               let v = require(resolveFrom(
-                path.dirname(project.projectConfig.configPath),
+                path.dirname(projectConfig.configPath),
                 'tailwindcss/package.json'
               )).version
               if (typeof v === 'string') {
                 twVersion = v
               }
             } catch {}
-            if (configTailwindVersionMap.get(project.projectConfig.configPath) !== twVersion) {
+            if (configTailwindVersionMap.get(projectConfig.configPath) !== twVersion) {
               needsRestart = true
               break changeLoop
             }
@@ -1802,10 +1798,11 @@           needsRestart = true
           break
         }
 
-        for (let [, project] of this.projects) {
+        for (let [key] of this.projects) {
+          let projectConfig = JSON.parse(key) as ProjectConfig
           if (
             change.type === FileChangeType.Deleted &&
-            changeAffectsFile(normalizedFilename, [project.projectConfig.configPath])
+            changeAffectsFile(normalizedFilename, [projectConfig.configPath])
           ) {
             needsRestart = true
             break changeLoop
@@ -2020,29 +2017,31 @@     params: InitializeParams,
     watchPatterns: (patterns: string[]) => void,
     tailwindVersion: string
   ): Promise<void> {
-    let key = String(this.projectCounter++)
-    const project = await createProjectService(
-      key,
-      projectConfig,
-      this.connection,
-      params,
-      this.documentService,
-      () => this.updateCapabilities(),
-      () => {
-        for (let document of this.documentService.getAllDocuments()) {
-          let project = this.getProject(document)
-          if (project && !project.enabled()) {
-            project.enable()
-            project.tryInit()
-            break
+    let key = JSON.stringify(projectConfig)
+
+    if (!this.projects.has(key)) {
+      const project = await createProjectService(
+        projectConfig,
+        this.connection,
+        params,
+        this.documentService,
+        () => this.updateCapabilities(),
+        () => {
+          for (let document of this.documentService.getAllDocuments()) {
+            let project = this.getProject(document)
+            if (project && !project.enabled()) {
+              project.enable()
+              project.tryInit()
+              break
+            }
           }
-        }
-      },
-      () => this.refreshDiagnostics(),
-      (patterns: string[]) => watchPatterns(patterns),
-      tailwindVersion
-    )
-    this.projects.set(key, project)
+        },
+        () => this.refreshDiagnostics(),
+        (patterns: string[]) => watchPatterns(patterns),
+        tailwindVersion
+      )
+      this.projects.set(key, project)
+    }
   }
 
   private refreshDiagnostics() {
@@ -2105,8 +2104,9 @@     let fallbackProject: ProjectService
     let matchedProject: ProjectService
     let matchedPriority: number = Infinity
 
-    for (let [, project] of this.projects) {
-      if (project.projectConfig.configPath) {
+    for (let [key, project] of this.projects) {
+      let projectConfig = JSON.parse(key) as ProjectConfig
+      if (projectConfig.configPath) {
         let documentSelector = project
           .documentSelector()
           .concat()