diff --git a/types/ramda/index.d.ts b/types/ramda/index.d.ts
index 69acb41dc6..5a3b58cd5b 100644
--- a/types/ramda/index.d.ts
+++ b/types/ramda/index.d.ts
@@ -19,13 +19,12 @@
 //                 Keagan McClelland <https://github.com/CaptJakk>
 //                 Tomas Szabo <https://github.com/deftomat>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.6
+// TypeScript Version: 2.8
 
 declare let R: R.Static;
 
 declare namespace R {
-    type Diff<T extends string, U extends string> = ({[P in T]: P } & {[P in U]: never } & { [x: string]: never })[T];
-    type Omit<T, K extends string> = Pick<T, Diff<keyof T, K>>;
+    type Omit<T, K extends string> = Pick<T, Exclude<keyof T, K>>;
 
     type Ord = number | string | boolean;
 
@@ -1296,8 +1295,8 @@ declare namespace R {
          * Returns a partial copy of an object containing only the keys specified.  If the key does not exist, the
          * property is ignored.
          */
-        pick<T, K extends string>(names: ReadonlyArray<K>, obj: T): Pick<T, Diff<keyof T, keyof Omit<T, K>>>;
-        pick<K extends string>(names: ReadonlyArray<K>): <T>(obj: T) => Pick<T, Diff<keyof T, keyof Omit<T, K>>>;
+        pick<T, K extends string>(names: ReadonlyArray<K>, obj: T): Pick<T, Exclude<keyof T, Exclude<keyof T, K>>>;
+        pick<K extends string>(names: ReadonlyArray<K>): <T>(obj: T) => Pick<T, Exclude<keyof T, Exclude<keyof T, K>>>;
 
         /**
          * Similar to `pick` except that this one includes a `key: undefined` pair for properties that don't exist.