diff --git a/.changeset/weak-islands-confess.md b/.changeset/weak-islands-confess.md
new file mode 100644
index 000000000..36d805cba
--- /dev/null
+++ b/.changeset/weak-islands-confess.md
@@ -0,0 +1,6 @@
+---
+'@emotion/core': major
+'emotion-theming': major
+---
+
+`emotion-theming` has been removed and all its exports were moved to `@emotion/core` package. Please import them like this `import { useTheme, ThemeProvider } from '@emotion/core' from now on`.
diff --git a/packages/core/types/index.d.ts b/packages/core/types/index.d.ts
index 2d13fa61d..bb821e8d2 100644
--- a/packages/core/types/index.d.ts
+++ b/packages/core/types/index.d.ts
@@ -1,5 +1,5 @@
 // Definitions by: Junyoung Clare Jang <https://github.com/Ailrun>
-// TypeScript Version: 2.8
+// TypeScript Version: 3.1
 
 import { EmotionCache } from '@emotion/cache'
 import {
diff --git a/packages/core/types/tests-theming.tsx b/packages/core/types/tests-theming.tsx
index 817ac9c3a..d43588cef 100644
--- a/packages/core/types/tests-theming.tsx
+++ b/packages/core/types/tests-theming.tsx
@@ -1,3 +1,6 @@
+// Definitions by: Junyoung Clare Jang <https://github.com/Ailrun>
+// TypeScript Version: 3.1
+
 import * as React from 'react'
 import {
   useTheme,
diff --git a/packages/core/types/tslint.json b/packages/core/types/tslint.json
index 6de1755f5..397bc8639 100644
--- a/packages/core/types/tslint.json
+++ b/packages/core/types/tslint.json
@@ -2,6 +2,7 @@
   "extends": "dtslint/dtslint.json",
   "rules": {
     "array-type": [true, "generic"],
+    "callable-types": false,
     "file-name-casing": false,
     "import-spacing": false,
     "semicolon": false,
@@ -18,6 +19,7 @@
       "check-preblock"
     ],
     "no-null-undefined-union": false,
+    "no-object-literal-type-assertion": false,
     "no-unnecessary-generics": false
   }
 }