diff --git a/CHANGELOG.md b/CHANGELOG.md
index b0cd966a8..3a8222e34 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ## [Unreleased]
 
 - Added `messageBack` to `CardActionTypes` and updated `CardAction` fields, by [@corinagum](https://github.com/corinagum), in PR [#138](https://github.com/Microsoft/BotFramework-DirectLineJS/pull/138)
+- Expand `CardAction`s with specific types, by [@corinagum](https://github.com/corinagum), in PR [#141](https://github.com/Microsoft/BotFramework-DirectLineJS/pull/141)
 
 ## [0.10.1] - 2018-12-21
 ### Changed
diff --git a/package-lock.json b/package-lock.json
index 4c762304d..285ede1a6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1594,12 +1594,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -1614,17 +1616,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -1741,7 +1746,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -1753,6 +1759,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -1767,6 +1774,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -1774,12 +1782,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.1",
             "yallist": "^3.0.0"
@@ -1798,6 +1808,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -1878,7 +1889,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -1890,6 +1902,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -2011,6 +2024,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
diff --git a/src/directLine.ts b/src/directLine.ts
index e8f99fe8d..0eece63aa 100644
--- a/src/directLine.ts
+++ b/src/directLine.ts
@@ -51,28 +51,93 @@ export interface UnknownMedia{
     thumbnailUrl?: string
 }
 
-export type CardActionTypes = "call" | "downloadFile" | "imBack" | "messageBack" | "openUrl" | "playAudio" | "playVideo" | "postBack" |  "signin" | "showImage";
+export type CardActionTypes = "call" | "downloadFile"| "imBack" | "messageBack" | "openUrl" | "playAudio" | "playVideo" | "postBack" | "signin" | "showImage";
 
-export type CardAction = CardActionWithImage | CardActionWithTitle;
+export type CardAction = CallCardAction | DownloadFileCardAction | IMBackCardAction | MessageBackCardAction | OpenURLCardAction | PlayAudioCardAction | PlayVideoCardAction | PostBackCardAction | SignInCardAction | ShowImageCardAction;
 
-export interface CardActionWithImage {
+export interface CallCardAction {
+    image?: string,
+    title: string,
+    type: "call",
+    value: any
+}
+
+export interface DownloadFileCardAction {
+    image?: string,
+    title: string,
+    type: "downloadFile",
+    value: any
+}
+
+export interface IMBackCardAction {
+    image?: string,
+    title?: string,
+    type: "imBack",
+    value: string
+}
+
+export type MessageBackCardAction = MessageBackWithImage | MessageBackWithTitle
+
+export interface MessageBackWithImage {
     displayText?: string,
     image: string,
     text?: string,
     title?: string,
-    type: CardActionTypes,
+    type: "messageBack",
     value?: any
 }
 
-export interface CardActionWithTitle {
+export interface MessageBackWithTitle {
     displayText?: string,
     image?: string,
     text?: string,
     title: string,
-    type: CardActionTypes,
+    type: "messageBack",
     value?: any
 }
 
+export interface OpenURLCardAction {
+    image?: string,
+    title: string,
+    type: "openUrl",
+    value: any
+}
+
+export interface PlayAudioCardAction {
+    image?: string,
+    title: string,
+    type: "playAudio",
+    value: any
+}
+
+export interface PlayVideoCardAction {
+    image?: string,
+    title: string,
+    type: "playVideo",
+    value: any
+}
+
+export interface PostBackCardAction {
+    image?: string,
+    title?: string,
+    type: "postBack",
+    value: any
+}
+
+export interface ShowImageCardAction {
+    image?: string,
+    title: string,
+    type: "showImage",
+    value: any
+}
+
+export interface SignInCardAction {
+    image?: string,
+    title: string,
+    type: "signin",
+    value: any
+}
+
 export interface CardImage {
     alt?: string,
     url: string,