diff --git a/packages/cli/generators/relation/base-relation.generator.js b/packages/cli/generators/relation/base-relation.generator.js
index d1127d2f425a..b94d10940d28 100644
--- a/packages/cli/generators/relation/base-relation.generator.js
+++ b/packages/cli/generators/relation/base-relation.generator.js
@@ -158,7 +158,7 @@ module.exports = class BaseRelationGenerator extends ArtifactGenerator {
     this.artifactInfo.srcRepositoryClassName =
       utils.toClassName(options.sourceModel) + 'Repository';
 
-    this.artifactInfo.srcRepositoryFileObj = new relationUtils.AstLoopBackProject().addExistingSourceFile(
+    this.artifactInfo.srcRepositoryFileObj = new relationUtils.AstLoopBackProject().addSourceFileAtPath(
       this.artifactInfo.srcRepositoryFile,
     );
 
diff --git a/packages/cli/generators/relation/index.js b/packages/cli/generators/relation/index.js
index 9b65bc41926b..2f29064b14ce 100644
--- a/packages/cli/generators/relation/index.js
+++ b/packages/cli/generators/relation/index.js
@@ -295,7 +295,7 @@ module.exports = class RelationGenerator extends ArtifactGenerator {
       this.artifactInfo.modelDir,
       utils.getModelFileName(this.artifactInfo.destinationModel),
     );
-    const df = project.addExistingSourceFile(destinationFile);
+    const df = project.addSourceFileAtPath(destinationFile);
     const cl = relationUtils.getClassObj(
       df,
       this.artifactInfo.destinationModel,
diff --git a/packages/cli/generators/relation/utils.generator.js b/packages/cli/generators/relation/utils.generator.js
index c2448ba46d6e..bb897c3bd730 100644
--- a/packages/cli/generators/relation/utils.generator.js
+++ b/packages/cli/generators/relation/utils.generator.js
@@ -40,14 +40,14 @@ exports.getModelPropertyType = function(modelDir, modelName, propertyName) {
   const project = new this.AstLoopBackProject();
 
   const modelFile = path.join(modelDir, utils.getModelFileName(modelName));
-  const sf = project.addExistingSourceFile(modelFile);
+  const sf = project.addSourceFileAtPath(modelFile);
   const co = this.getClassObj(sf, modelName);
   return this.getPropertyType(co, propertyName);
 };
 
 exports.addFileToProject = function(project, dir, modelName) {
   const fileName = path.resolve(dir, utils.getModelFileName(modelName));
-  return project.addExistingSourceFile(fileName);
+  return project.addSourceFileAtPath(fileName);
 };
 
 exports.getClassObj = function(fileName, modelName) {
@@ -72,7 +72,7 @@ exports.addExportController = async function(
   };
 
   if (generator.fs.exists(fileName)) {
-    pFile = project.addExistingSourceFile(fileName);
+    pFile = project.addSourceFileAtPath(fileName);
     // Exported declarations is now a `Map<string, Declaration[]>`
     const exportedDeclarations = pFile.getExportedDeclarations();
     for (const declarations of exportedDeclarations.values()) {
diff --git a/packages/cli/package-lock.json b/packages/cli/package-lock.json
index 9c34aac97bfa..92b75dfe010e 100644
--- a/packages/cli/package-lock.json
+++ b/packages/cli/package-lock.json
@@ -191,14 +191,13 @@
 			}
 		},
 		"@ts-morph/common": {
-			"version": "0.1.1",
-			"resolved": "https://registry.npmjs.org/@ts-morph/common/-/common-0.1.1.tgz",
-			"integrity": "sha512-8TLlC85CXgKNoTeqoXtrscPmKDbQCBfwZJ4hqli/QI4STa7sD2H6UqI9LSg8uBV5FYaD0QSdj/mtrCDrELvF+Q==",
+			"version": "0.2.2",
+			"resolved": "https://registry.npmjs.org/@ts-morph/common/-/common-0.2.2.tgz",
+			"integrity": "sha512-cMUlKTWvrfE5RYJn2VvM67iwIPl3aXm4xfm8oHzCCi2YaWp+NlSuiqj5cUMh+Lse2y84BqjAVOxAv1AY1Ncf+w==",
 			"requires": {
 				"@dsherret/to-absolute-glob": "^2.0.2",
+				"fast-glob": "^3.1.0",
 				"fs-extra": "^8.1.0",
-				"glob-parent": "^5.1.0",
-				"globby": "^10.0.1",
 				"is-negated-glob": "^1.0.0",
 				"multimatch": "^4.0.0",
 				"typescript": "~3.7.2"
@@ -1431,14 +1430,6 @@
 			"resolved": "https://registry.npmjs.org/diff/-/diff-4.0.1.tgz",
 			"integrity": "sha512-s2+XdvhPCOF01LRQBC8hf4vhbVmI2CGS5aZnxLJlT5FtdhPCDFq80q++zK2KlrVorVDdL5BOGZ/VfLrVtYNF+Q=="
 		},
-		"dir-glob": {
-			"version": "3.0.1",
-			"resolved": "https://registry.npmjs.org/dir-glob/-/dir-glob-3.0.1.tgz",
-			"integrity": "sha512-WkrWp9GR4KXfKGYzOLmTuGVi1UWFfws377n9cc55/tb6DuqyF6pcQ5AbiHEshaDpY9v6oaSr2XCDidGmMwdzIA==",
-			"requires": {
-				"path-type": "^4.0.0"
-			}
-		},
 		"dot-case": {
 			"version": "2.1.1",
 			"resolved": "https://registry.npmjs.org/dot-case/-/dot-case-2.1.1.tgz",
@@ -2141,21 +2132,6 @@
 				"cldrjs": "^0.5.0"
 			}
 		},
-		"globby": {
-			"version": "10.0.2",
-			"resolved": "https://registry.npmjs.org/globby/-/globby-10.0.2.tgz",
-			"integrity": "sha512-7dUi7RvCoT/xast/o/dLN53oqND4yk0nsHkhRgn9w65C4PofCLOoJ39iSOg+qVDdWQPIEj+eszMHQ+aLVwwQSg==",
-			"requires": {
-				"@types/glob": "^7.1.1",
-				"array-union": "^2.1.0",
-				"dir-glob": "^3.0.1",
-				"fast-glob": "^3.0.3",
-				"glob": "^7.1.3",
-				"ignore": "^5.1.1",
-				"merge2": "^1.2.3",
-				"slash": "^3.0.0"
-			}
-		},
 		"got": {
 			"version": "9.6.0",
 			"resolved": "https://registry.npmjs.org/got/-/got-9.6.0.tgz",
@@ -2385,11 +2361,6 @@
 			"resolved": "https://registry.npmjs.org/iferr/-/iferr-0.1.5.tgz",
 			"integrity": "sha1-xg7taebY/bazEEofy8ocGS3FtQE="
 		},
-		"ignore": {
-			"version": "5.1.4",
-			"resolved": "https://registry.npmjs.org/ignore/-/ignore-5.1.4.tgz",
-			"integrity": "sha512-MzbUSahkTW1u7JpKKjY7LCARd1fU5W2rLdxlM4kdkayuCwZImjkpluF9CM1aLewYJguPDqewLam18Y6AU69A8A=="
-		},
 		"ignore-walk": {
 			"version": "3.0.3",
 			"resolved": "https://registry.npmjs.org/ignore-walk/-/ignore-walk-3.0.3.tgz",
@@ -4745,11 +4716,6 @@
 			"resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz",
 			"integrity": "sha1-32BBeABfUi8V60SQ5yR6G/qmf4w="
 		},
-		"path-type": {
-			"version": "4.0.0",
-			"resolved": "https://registry.npmjs.org/path-type/-/path-type-4.0.0.tgz",
-			"integrity": "sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw=="
-		},
 		"performance-now": {
 			"version": "2.1.0",
 			"resolved": "https://registry.npmjs.org/performance-now/-/performance-now-2.1.0.tgz",
@@ -5444,11 +5410,6 @@
 				"supports-color": "^7.1.0"
 			}
 		},
-		"slash": {
-			"version": "3.0.0",
-			"resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
-			"integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q=="
-		},
 		"smart-buffer": {
 			"version": "4.1.0",
 			"resolved": "https://registry.npmjs.org/smart-buffer/-/smart-buffer-4.1.0.tgz",
@@ -6195,13 +6156,13 @@
 			"integrity": "sha1-y99WD9e5r2MlAv7UD5GMFX6pcTc="
 		},
 		"ts-morph": {
-			"version": "5.0.0",
-			"resolved": "https://registry.npmjs.org/ts-morph/-/ts-morph-5.0.0.tgz",
-			"integrity": "sha512-VP5dFnOzmlsDkSyuGczgVNtyJdYXMxFqMO2Rb0pIeni0o0Cy/nDljETBWhJs4FI4DIWv7Ftq69kgZO8p8w6LCw==",
+			"version": "6.0.2",
+			"resolved": "https://registry.npmjs.org/ts-morph/-/ts-morph-6.0.2.tgz",
+			"integrity": "sha512-o7FPVY0jMSKlJHfyfEkiCWTq7vqdmNLQaQd4jXY7lxCELgh+h7zI+frvSe7S0o/TJAAKViy9wM/FzRXW+9LnZQ==",
 			"requires": {
 				"@dsherret/to-absolute-glob": "^2.0.2",
-				"@ts-morph/common": "~0.1.0",
-				"code-block-writer": "^10.0.0"
+				"@ts-morph/common": "~0.2.2",
+				"code-block-writer": "^10.1.0"
 			}
 		},
 		"tslib": {
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 49a89c8581f5..3cfd2936ea94 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -64,7 +64,7 @@
     "swagger-parser": "^8.0.4",
     "swagger2openapi": "^5.3.2",
     "tildify": "^2.0.0",
-    "ts-morph": "^5.0.0",
+    "ts-morph": "^6.0.2",
     "typescript": "~3.7.4",
     "unicode-10.0.0": "^0.7.5",
     "untildify": "^4.0.0",