diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4c9ce527..ea4ca735 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@ Breaking changes:
 Improvements:
 
 * Add types for User-Interactive Authentication API: `r0::account::{UserInteractiveAuthenticationInfo, AuthenticationFlow}`
+* Add missing serde attributes to `get_content_thumbnail` query parameters
 
 # 0.7.2
 
diff --git a/src/r0/media/get_content_thumbnail.rs b/src/r0/media/get_content_thumbnail.rs
index 567631d9..a6d9a127 100644
--- a/src/r0/media/get_content_thumbnail.rs
+++ b/src/r0/media/get_content_thumbnail.rs
@@ -29,6 +29,7 @@ ruma_api! {
         ///
         /// Used to prevent routing loops. Defaults to `true`.
         #[ruma_api(query)]
+        #[serde(skip_serializing_if = "Option::is_none")]
         pub allow_remote: Option<bool>,
         /// The media ID from the mxc:// URI (the path component).
         #[ruma_api(path)]
@@ -42,6 +43,7 @@ ruma_api! {
         pub height: UInt,
         /// The desired resizing method.
         #[ruma_api(query)]
+        #[serde(skip_serializing_if = "Option::is_none")]
         pub method: Option<Method>,
         /// The *desired* width of the thumbnail. The actual thumbnail may not match the size
         /// specified.