diff --git a/types/theo/index.d.ts b/types/theo/index.d.ts
index 870123fadc..3747a69fcf 100644
--- a/types/theo/index.d.ts
+++ b/types/theo/index.d.ts
@@ -3,7 +3,7 @@
 // Definitions by: Pete Petrash <https://github.com/petekp>
 //                 Niko Laitinen <https://github.com/laitine>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 3.2.4
+// TypeScript Version: 3.2
 
 import { Collection, Map, List, OrderedMap } from "immutable";
 
@@ -70,6 +70,8 @@ export type FormatResultFn = (result: ImmutableStyleMap) => string;
 
 export interface StyleMap {
     aliases: Aliases;
+    global?: Props;
+    imports?: string[];
     props: Props;
     meta: Meta;
     options: object;
diff --git a/types/theo/package.json b/types/theo/package.json
index 6c119dd781..33339a3f75 100644
--- a/types/theo/package.json
+++ b/types/theo/package.json
@@ -1,6 +1,6 @@
 {
     "private": true,
     "dependencies": {
-        "immutable": "4.0.0-rc.12"
+        "immutable": "3.8.2"
     }
 }
diff --git a/types/theo/theo-tests.ts b/types/theo/theo-tests.ts
index 154817793f..d7692e4265 100644
--- a/types/theo/theo-tests.ts
+++ b/types/theo/theo-tests.ts
@@ -21,11 +21,12 @@ theo.registerFormat(
 );
 
 theo.registerValueTransform(
-    "relative/pixelValue",
-    prop => prop.get("category") === "sizing",
+    "easing/web",
+    prop => prop.get("category") === "easing",
     prop => {
-        // @ts-ignore: prop can be undefined
-        const value = prop.get("value").toString();
-        return parseFloat(value.replace(/rem/g, "")) * 16;
+        const [x1, y1, x2, y2] = prop.get("value").toArray();
+        return `cubic-bezier(${x1}, ${y1}, ${x2}, ${y2})`;
     }
 );
+
+theo.registerTransform("web", ["color/rgb", "easing/web"]);