diff --git a/CHANGELOG.md b/CHANGELOG.md
index 92db0a3..7218b77 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- removed `typescript-is` and replaced it with `ajv` validation
+- `isProfileDocumentNode` and `isMapDocumentNode` do full schema validation
 
 ## [1.1.0] - 2022-01-19
 ### Added
diff --git a/package.json b/package.json
index d2bf031..6a961cb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@superfaceai/ast",
-  "version": "1.1.1-beta.0",
+  "version": "1.2.0-rc.0",
   "description": "Superface profile and map language ASTs, https://superface.ai",
   "main": "dist/index.js",
   "source": "src/index.ts",
diff --git a/src/interfaces/ast/map-ast.utils.ts b/src/interfaces/ast/map-ast.utils.ts
index 3f65bf2..16ab8ba 100644
--- a/src/interfaces/ast/map-ast.utils.ts
+++ b/src/interfaces/ast/map-ast.utils.ts
@@ -27,6 +27,16 @@ const assertMapDocument: Assert<MapDocumentNode> = prepareAssert(
   'map-ast'
 );
 
+export const isMapDocumentNode = (node: unknown): node is MapDocumentNode => {
+  try {
+    assertMapDocument(node);
+
+    return true;
+  } catch {
+    return false;
+  }
+};
+
 // We don't need to do JSON Schema validation on these, as they should be already validated
 export const isAssignmentNode = (node: MapASTNode): node is AssignmentNode =>
   node.kind === 'Assignment';
@@ -55,8 +65,6 @@ export const isJessieExpressionNode = (
 export const isMapDefinitionNode = (
   node: MapASTNode
 ): node is MapDefinitionNode => node.kind === 'MapDefinition';
-export const isMapDocumentNode = (node: MapASTNode): node is MapDocumentNode =>
-  node.kind === 'MapDocument';
 export const isMapHeaderNode = (node: MapASTNode): node is MapHeaderNode =>
   node.kind === 'MapHeader';
 export const isObjectLiteralNode = (
diff --git a/src/interfaces/ast/profile-ast.utils.ts b/src/interfaces/ast/profile-ast.utils.ts
index 89689f2..6c691fa 100644
--- a/src/interfaces/ast/profile-ast.utils.ts
+++ b/src/interfaces/ast/profile-ast.utils.ts
@@ -35,6 +35,18 @@ const assertProfileDocument: Assert<ProfileDocumentNode> = prepareAssert(
   'profile-ast'
 );
 
+export const isProfileDocumentNode = (
+  node: unknown
+): node is ProfileDocumentNode => {
+  try {
+    assertProfileDocument(node);
+
+    return true;
+  } catch {
+    return false;
+  }
+};
+
 // We don't need to do JSON Schema validation on these, as they should be already validated
 export const isEnumDefinitionNode = (
   node: ProfileASTNode
@@ -65,9 +77,6 @@ export const isObjectDefinitionNode = (
 export const isPrimitiveTypeNameNode = (
   node: ProfileASTNode
 ): node is PrimitiveTypeNameNode => node.kind === 'PrimitiveTypeName';
-export const isProfileDocumentNode = (
-  node: ProfileASTNode
-): node is ProfileDocumentNode => node.kind === 'ProfileDocument';
 export const isProfileHeaderNode = (
   node: ProfileASTNode
 ): node is ProfileHeaderNode => node.kind === 'ProfileHeader';