diff --git a/CHANGELOG b/CHANGELOG
index 8a6e3d3..13c982a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+
+webapp:
+* warn about unencrypted attachments limitation
+
 0.9.1 (19/05/2022)
 -----
 
diff --git a/webapp/src/hooks.tsx b/webapp/src/hooks.tsx
index 812319e..de12fb7 100644
--- a/webapp/src/hooks.tsx
+++ b/webapp/src/hooks.tsx
@@ -316,7 +316,9 @@ export default class E2EEHooks {
                 for (const [userID, _] of newPubkeys) {
                     msg += ' @' + getUser(this.store.getState(), userID).username;
                 }
+
                 this.sendEphemeralPost(msg, chanID);
+                this.sendEphemeralPost('(attachments are not encrypted and are sent in plaintext)', chanID);
             }
             await storeChannelPubkeys(chanID, pubkeyValues);