diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35ec1476..57fed245 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,10 @@ Breaking changes:
   * Remove deprecated `home_server` response field (removed in r0.4.0)
 * Add `auth_parameters` to `r0::account::AuthenticationData` 
 
+Improvements:
+
+* Add types for User-Interactive Authentication API: `r0::account::{UserInteractiveAuthenticationInfo, AuthenticationFlow}`
+
 # 0.7.2
 
 Bug fixes:
diff --git a/src/r0/account.rs b/src/r0/account.rs
index 8b870bae..6598d76d 100644
--- a/src/r0/account.rs
+++ b/src/r0/account.rs
@@ -34,6 +34,31 @@ pub struct AuthenticationData {
     pub auth_parameters: BTreeMap<String, serde_json::Value>,
 }
 
+/// Information about available authentication flows and status for
+/// User-Interactive Authenticiation API.
+#[derive(Clone, Debug, Deserialize, Serialize)]
+pub struct UserInteractiveAuthenticationInfo {
+    /// List of authentication flows available for this endpoint.
+    pub flows: Vec<AuthenticationFlow>,
+    /// List of stages in the current flow completed by the client.
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub completed: Vec<String>,
+    /// Authentication parameters required for the client to complete authentication.
+    pub params: serde_json::Value,
+    /// Session key for client to use to complete authentication.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub session: Option<String>,
+}
+
+/// Description of steps required to authenticate via the User-Interactive
+/// Authentication API.
+#[derive(Clone, Debug, Deserialize, Serialize)]
+pub struct AuthenticationFlow {
+    /// Ordered list of stages required to complete authentication.
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub stages: Vec<String>,
+}
+
 /// Additional authentication information for requestToken endpoints.
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct IdentityServerInfo {