diff --git a/server/src/schema/mutations/EditRuleOfCompetition.js b/server/src/schema/mutations/EditRuleOfCompetition.js
new file mode 100644
index 000000000..55cd5519c
--- /dev/null
+++ b/server/src/schema/mutations/EditRuleOfCompetition.js
@@ -0,0 +1,56 @@
+import {
+  GraphQLNonNull,
+  GraphQLID,
+  GraphQLString
+} from 'graphql'
+import { CompetitionType } from '../types'
+import Competition from '../../models/competition'
+
+const args = {
+  codeName: { type: new GraphQLNonNull(GraphQLID) },
+  title: { type: new GraphQLNonNull(GraphQLString) },
+  newtitle: { type: GraphQLString },
+  description: { type: GraphQLString }
+}
+
+const resolve = (parent, { codeName, title, newtitle, description }, context) => {
+  // let authIdOnSession = context.user.sub
+  return new Promise((resolve, reject) => {
+    Competition.findOne({ codeName }).exec((err, competition) => {
+      if (err) reject(err)
+      else {
+        let ruleIndex
+        competition.rules.find((rule, index) => {
+          if (rule.title === title) {
+            ruleIndex = index
+          }
+        })
+
+        competition.rules[ruleIndex].description = description || competition.rules[ruleIndex].description
+        if (competition.rules.some(rule => rule.title === newtitle)) {
+          // need to add an error message here TODO
+          resolve(competition)
+        } else {
+          competition.rules[ruleIndex].title = newtitle || competition.rules[ruleIndex].title
+        }
+
+        competition.save((err) => {
+          if (err) reject(err)
+          else {
+            resolve(competition)
+          }
+        })
+      }
+    })
+  })
+}
+
+const mutation = {
+  editRuleOfCompetition: {
+    type: CompetitionType,
+    args,
+    resolve
+  }
+}
+
+export default mutation
diff --git a/server/src/schema/mutations/index.js b/server/src/schema/mutations/index.js
index f6bec378f..4ae05f2ce 100644
--- a/server/src/schema/mutations/index.js
+++ b/server/src/schema/mutations/index.js
@@ -6,6 +6,7 @@ import HostCompetitionMutation from './HostCompetition'
 import RegisterToCompetitionMutation from './RegisterToCompetition'
 import AddRuleToCompetitionMutation from './AddRuleToCompetition'
 import EditCompetitionMutation from './EditCompetition'
+import EditRuleOfCompetitionMutation from './EditRuleOfCompetition'
 
 const Mutation = new GraphQLObjectType({
   name: 'Mutation',
@@ -13,7 +14,8 @@ const Mutation = new GraphQLObjectType({
     HostCompetitionMutation,
     RegisterToCompetitionMutation,
     AddRuleToCompetitionMutation,
-    EditCompetitionMutation
+    EditCompetitionMutation,
+    EditRuleOfCompetitionMutation
   )
 })