diff --git a/.changeset/wacky-llamas-rule.md b/.changeset/wacky-llamas-rule.md
new file mode 100644
index 00000000..a4c17576
--- /dev/null
+++ b/.changeset/wacky-llamas-rule.md
@@ -0,0 +1,5 @@
+---
+'@eddeee888/gcg-typescript-resolver-files': patch
+---
+
+Keep ts-morph project reference between watches
diff --git a/packages/typescript-resolver-files/src/generateResolverFiles/postProcessFiles.ts b/packages/typescript-resolver-files/src/generateResolverFiles/postProcessFiles.ts
index 580d623d..4c1d4792 100644
--- a/packages/typescript-resolver-files/src/generateResolverFiles/postProcessFiles.ts
+++ b/packages/typescript-resolver-files/src/generateResolverFiles/postProcessFiles.ts
@@ -145,21 +145,21 @@ export const postProcessFiles = ({
         }
       );
     });
-  }
 
-  // 4. Apply to result files the updated content done in step 2. and 3. above
-  sourceFilesToProcess.forEach(({ sourceFile, resolverFile }) => {
-    const normalizedRelativePath = path.posix.relative(
-      cwd(),
-      sourceFile.getFilePath()
-    );
+    // 4. Apply to result files the updated content done in step 2. and 3. above
+    sourceFilesToProcess.forEach(({ sourceFile, resolverFile }) => {
+      const normalizedRelativePath = path.posix.relative(
+        cwd(),
+        sourceFile.getFilePath()
+      );
 
-    // Overwrite existing files with fixes
-    result.files[normalizedRelativePath] = {
-      ...resolverFile,
-      content: sourceFile.getText(),
-    };
-  });
+      // Overwrite existing files with fixes
+      result.files[normalizedRelativePath] = {
+        ...resolverFile,
+        content: sourceFile.getText(),
+      };
+    });
+  }
 };
 
 /**
diff --git a/packages/typescript-resolver-files/src/preset.ts b/packages/typescript-resolver-files/src/preset.ts
index bc078787..197d0266 100644
--- a/packages/typescript-resolver-files/src/preset.ts
+++ b/packages/typescript-resolver-files/src/preset.ts
@@ -29,6 +29,8 @@ import { logger } from './utils/index.js';
 
 export const presetName = '@eddeee888/gcg-typescript-resolver-files';
 
+let tsMorphProject: Project;
+
 export const preset: Types.OutputPreset<RawPresetConfig> = {
   buildGeneratesSection: async ({
     schema,
@@ -88,10 +90,18 @@ export const preset: Types.OutputPreset<RawPresetConfig> = {
       moduleNamingMode,
     });
 
-    const tsMorphProject = await profiler.run(
-      async () => new Project(tsMorphProjectOptions),
-      createProfilerRunName('Initialising ts-morph project')
-    );
+    if (!tsMorphProject) {
+      tsMorphProject = await profiler.run(
+        async () => new Project(tsMorphProjectOptions),
+        createProfilerRunName('Initialising ts-morph project')
+      );
+    } else {
+      await profiler.run(async () => {
+        tsMorphProject
+          .getSourceFiles()
+          .forEach((sourceFile) => sourceFile.refreshFromFileSystemSync());
+      }, createProfilerRunName('Refreshing ts-morph project files'));
+    }
 
     const typeMappersMap = await profiler.run(
       async () =>