diff --git a/app/embeds/Mindmeister.js b/app/embeds/Mindmeister.js
index 42c976467..3f2927e87 100644
--- a/app/embeds/Mindmeister.js
+++ b/app/embeds/Mindmeister.js
@@ -17,7 +17,10 @@ export default class Mindmeister extends React.Component<Props> {
   static ENABLED = [URL_REGEX];
 
   render() {
-    const chartId = this.props.attrs.matches[4] + this.props.attrs.matches[6];
+    const chartId =
+      this.props.attrs.matches[4] +
+      (this.props.attrs.matches[5] || "") +
+      (this.props.attrs.matches[6] || "");
 
     return (
       <Frame
diff --git a/app/embeds/components/Frame.js b/app/embeds/components/Frame.js
index 77e69c762..2cd796249 100644
--- a/app/embeds/components/Frame.js
+++ b/app/embeds/components/Frame.js
@@ -11,9 +11,7 @@ import Flex from "components/Flex";
 const Iframe = (props) => <iframe title="Embed" {...props} />;
 
 const StyledIframe = styled(Iframe)`
-  border: 1px solid;
-  border-color: ${(props) => props.theme.embedBorder};
-  border-radius: ${(props) => (props.withBar ? "3px 3px 0 0" : "3px")};
+  border-radius: ${(props) => (props.$withBar ? "3px 3px 0 0" : "3px")};
   display: block;
 `;
 
@@ -70,13 +68,13 @@ class Frame extends React.Component<PropsWithRef> {
       <Rounded
         width={width}
         height={height}
-        withBar={withBar}
+        $withBar={withBar}
         className={isSelected ? "ProseMirror-selectednode" : ""}
       >
         {this.isLoaded && (
           <Component
             ref={forwardedRef}
-            withBar={withBar}
+            $withBar={withBar}
             sandbox="allow-same-origin allow-scripts allow-popups allow-forms"
             width={width}
             height={height}
@@ -108,10 +106,11 @@ class Frame extends React.Component<PropsWithRef> {
 }
 
 const Rounded = styled.div`
-  border-radius: ${(props) => (props.withBar ? "3px 3px 0 0" : "3px")};
+  border: 1px solid ${(props) => props.theme.embedBorder};
+  border-radius: 6px;
   overflow: hidden;
   width: ${(props) => props.width};
-  height: ${(props) => (props.withBar ? props.height + 28 : props.height)};
+  height: ${(props) => (props.$withBar ? props.height + 28 : props.height)};
 `;
 
 const Open = styled.a`
@@ -132,11 +131,12 @@ const Title = styled.span`
 `;
 
 const Bar = styled(Flex)`
+  border-top: 1px solid ${(props) => props.theme.embedBorder};
   background: ${(props) => props.theme.secondaryBackground};
   color: ${(props) => props.theme.textSecondary};
   padding: 0 8px;
-  border-bottom-left-radius: 3px;
-  border-bottom-right-radius: 3px;
+  border-bottom-left-radius: 6px;
+  border-bottom-right-radius: 6px;
   user-select: none;
 `;