diff --git a/core/scm.js b/core/scm.js
index 980475b6..b8e93b55 100644
--- a/core/scm.js
+++ b/core/scm.js
@@ -251,7 +251,22 @@ const SCHEMA_HOOK = Joi.object()
         releaseAuthor: Joi.string()
             .allow('')
             .optional()
-            .label('Author of the event')
+            .label('Author of the event'),
+
+        addedFiles: Joi.array()
+            .items(Joi.string().allow(''))
+            .optional()
+            .label('Added files of head commit'),
+
+        modifiedFiles: Joi.array()
+            .items(Joi.string().allow(''))
+            .optional()
+            .label('Modified files of head commit'),
+
+        removedFiles: Joi.array()
+            .items(Joi.string().allow(''))
+            .optional()
+            .label('Removed files of head commit')
     })
     .label('SCM Hook');
 
diff --git a/plugins/scm.js b/plugins/scm.js
index d2784c1d..5b03f743 100644
--- a/plugins/scm.js
+++ b/plugins/scm.js
@@ -154,7 +154,7 @@ const GET_FILE = Joi.object()
 const GET_CHANGED_FILES_INPUT = Joi.object()
     .keys({
         type,
-        payload: Joi.object()
+        webhookConfig: Joi.object()
             .allow(null)
             .required(),
         token,
diff --git a/test/core/scm.test.js b/test/core/scm.test.js
index 88f8c83c..cf1b2bb8 100644
--- a/test/core/scm.test.js
+++ b/test/core/scm.test.js
@@ -72,6 +72,18 @@ describe('scm core', () => {
             assert.isNotNull(validate('scm.hook.push.invalid-array.yaml', core.scm.hook).error);
         });
 
+        it('fails the push hook because added files is not an array of string', () => {
+            assert.isNotNull(validate('scm.hook.push.invalid-added-files.yaml', core.scm.hook).error);
+        });
+
+        it('fails the push hook because modified files is not an array of string', () => {
+            assert.isNotNull(validate('scm.hook.push.invalid-modified-files.yaml', core.scm.hook).error);
+        });
+
+        it('fails the push hook because removed files is not an array of string', () => {
+            assert.isNotNull(validate('scm.hook.push.invalid-removed-files.yaml', core.scm.hook).error);
+        });
+
         it('validates the ping hook', () => {
             assert.isNull(validate('scm.hook.ping.yaml', core.scm.hook).error);
         });
diff --git a/test/data/scm.getChangedFilesInput.yaml b/test/data/scm.getChangedFilesInput.yaml
index 006a96b2..0e679108 100644
--- a/test/data/scm.getChangedFilesInput.yaml
+++ b/test/data/scm.getChangedFilesInput.yaml
@@ -1,4 +1,4 @@
-payload:
+webhookConfig:
     ref: 'refs/heads/master'
     before: '9049f1265b7d61be4a8904a9a27120d2064dab3b'
     after: '0d1a26e67d8f5eaf1f6ba5c57fc3c7d91ac0fd1c'
diff --git a/test/data/scm.hook.push.invalid-added-files.yaml b/test/data/scm.hook.push.invalid-added-files.yaml
new file mode 100644
index 00000000..153cb898
--- /dev/null
+++ b/test/data/scm.hook.push.invalid-added-files.yaml
@@ -0,0 +1,14 @@
+# # Invalid SCM Hook addedFiles
+action: push
+branch: master
+checkoutUrl: git@github.com:screwdriver-cd/data-model.git#master
+hookId: 81e6bd80-9a2c-11e6-939d-beaa5d9adaf3
+scmContext: github:github.com
+sha: ccc49349d3cffbd12ea9e3d41521480b4aa5de5f
+type: repo
+username: stjohnjohnson
+ref: reference
+commitAuthors: ['john1', 'john2']
+addedFiles: 'README.md'
+modifiedFiles: ['README.md','package.json']
+removedFiles: ['screwdriver.yaml']
\ No newline at end of file
diff --git a/test/data/scm.hook.push.invalid-modified-files.yaml b/test/data/scm.hook.push.invalid-modified-files.yaml
new file mode 100644
index 00000000..dd90b02b
--- /dev/null
+++ b/test/data/scm.hook.push.invalid-modified-files.yaml
@@ -0,0 +1,14 @@
+# # Invalid SCM Hook modifiedFiles
+action: push
+branch: master
+checkoutUrl: git@github.com:screwdriver-cd/data-model.git#master
+hookId: 81e6bd80-9a2c-11e6-939d-beaa5d9adaf3
+scmContext: github:github.com
+sha: ccc49349d3cffbd12ea9e3d41521480b4aa5de5f
+type: repo
+username: stjohnjohnson
+ref: reference
+commitAuthors: ['john1', 'john2']
+addedFiles: ['README.md']
+modifiedFiles: 'README.md'
+removedFiles: ['screwdriver.yaml']
\ No newline at end of file
diff --git a/test/data/scm.hook.push.invalid-removed-files.yaml b/test/data/scm.hook.push.invalid-removed-files.yaml
new file mode 100644
index 00000000..b57ca134
--- /dev/null
+++ b/test/data/scm.hook.push.invalid-removed-files.yaml
@@ -0,0 +1,14 @@
+# # Invalid SCM Hook removedFiles
+action: push
+branch: master
+checkoutUrl: git@github.com:screwdriver-cd/data-model.git#master
+hookId: 81e6bd80-9a2c-11e6-939d-beaa5d9adaf3
+scmContext: github:github.com
+sha: ccc49349d3cffbd12ea9e3d41521480b4aa5de5f
+type: repo
+username: stjohnjohnson
+ref: reference
+commitAuthors: ['john1', 'john2']
+addedFiles: ['README.md']
+modifiedFiles: ['README.md','package.json']
+removedFiles: 'screwdriver.yaml'
\ No newline at end of file
diff --git a/test/data/scm.hook.push.yaml b/test/data/scm.hook.push.yaml
index 19935a2f..0b726c00 100644
--- a/test/data/scm.hook.push.yaml
+++ b/test/data/scm.hook.push.yaml
@@ -8,4 +8,7 @@ sha: ccc49349d3cffbd12ea9e3d41521480b4aa5de5f
 type: repo
 username: stjohnjohnson
 ref: reference
-commitAuthors: ['john1', 'john2']
\ No newline at end of file
+commitAuthors: ['john1', 'john2']
+addedFiles: ['README.md']
+modifiedFiles: ['README.md','package.json']
+removedFiles: ['screwdriver.yaml']
\ No newline at end of file