diff --git a/explanation/architecture.md b/explanation/architecture.md
index ca0355e..7cef7b7 100644
--- a/explanation/architecture.md
+++ b/explanation/architecture.md
@@ -171,7 +171,7 @@ graph TB
 
 **Workflow**:
 
-:::{div}
+:::\{div}
 :class: dark:hidden
 
 ```{mermaid}
@@ -195,7 +195,7 @@ sequenceDiagram
 
 :::
 
-:::{div}
+:::\{div}
 :class: hidden dark:block
 
 ```{mermaid}
@@ -276,15 +276,15 @@ graph LR
 
 **Infrastructure Details**:
 
-| Component       | Technology       | Configuration                                        |
-| --------------- | ---------------- | ---------------------------------------------------- |
-| **Platform**    | [Fly.io](https://fly.io) | Primary region: Newark (ewr)                         |
-| **Application** | Docker container | Gunicorn with 2 workers, WhiteNoise for static files |
+| Component       | Technology                  | Configuration                                        |
+| --------------- | --------------------------- | ---------------------------------------------------- |
+| **Platform**    | [Fly.io](https://fly.io)    | Primary region: Newark (ewr)                         |
+| **Application** | Docker container            | Gunicorn with 2 workers, WhiteNoise for static files |
 | **Compute**     | [Fly.io](https://fly.io) VM | 1GB RAM, 1 shared vCPU                               |
-| **Database**    | Fly Postgres     | Managed PostgreSQL with automated backups            |
-| **HTTPS**       | Fly Proxy        | Automatic TLS certificates, forced HTTPS             |
-| **Scaling**     | Auto-scaling     | Min 1 machine, auto-stop/start on traffic            |
-| **Deployment**  | GitHub Actions   | Automated deploy on push to main branch              |
+| **Database**    | Fly Postgres                | Managed PostgreSQL with automated backups            |
+| **HTTPS**       | Fly Proxy                   | Automatic TLS certificates, forced HTTPS             |
+| **Scaling**     | Auto-scaling                | Min 1 machine, auto-stop/start on traffic            |
+| **Deployment**  | GitHub Actions              | Automated deploy on push to main branch              |
 
 **Deployment Workflow**:
 
diff --git a/explanation/data-flow.md b/explanation/data-flow.md
index bc34905..0918ef4 100644
--- a/explanation/data-flow.md
+++ b/explanation/data-flow.md
@@ -11,7 +11,7 @@ This document traces that journey step by step, explaining not just *what* happe
 
 Health data flows through JupyterHealth Exchange across three major phases: **Acquisition**, **Exchange**, and **Analysis**. This sequence diagram shows **who** does **what** at each stage:
 
-:::{div}
+:::\{div}
 :class: dark:hidden
 
 ```{mermaid}
@@ -51,7 +51,7 @@ sequenceDiagram
 
 :::
 
-:::{div}
+:::\{div}
 :class: hidden dark:block
 
 ```{mermaid}
diff --git a/package-lock.json b/package-lock.json
index 3af2153..814a7c8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,13 +8,13 @@
       "name": "jupyter-health-software-documentation",
       "version": "0.0.0",
       "dependencies": {
-        "mystmd": "^1.6.3"
+        "mystmd": "^1.6.4"
       }
     },
     "node_modules/mystmd": {
-      "version": "1.6.3",
-      "resolved": "https://registry.npmjs.org/mystmd/-/mystmd-1.6.3.tgz",
-      "integrity": "sha512-tBkZq6wl8QbNULWDT1pQqY1UcEcZqtVi8NWIhd4Q6/363vGiG9RQvw5eHmupaxiW8x61mCZdJUqleoPWprNoAw==",
+      "version": "1.6.4",
+      "resolved": "https://registry.npmjs.org/mystmd/-/mystmd-1.6.4.tgz",
+      "integrity": "sha512-MbxzU8hLXvRWG8gfGZbKG8m1aa8GAzRINiUE10PO0EcbZ08n01Sz1MqVWBGznVNdhI60pjqIWTHA9UziOj9kSA==",
       "license": "MIT",
       "bin": {
         "myst": "dist/myst.cjs"
diff --git a/package.json b/package.json
index e51f89d..51c3ce4 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,6 @@
     "test": "myst build --html --check-links --strict"
   },
   "dependencies": {
-    "mystmd": "^1.6.3"
+    "mystmd": "^1.6.4"
   }
 }
diff --git a/tutorial/tutorial-cgm.ipynb b/tutorial/tutorial-cgm.ipynb
index fb9d9dd..6562b42 100644
--- a/tutorial/tutorial-cgm.ipynb
+++ b/tutorial/tutorial-cgm.ipynb
@@ -2781,4 +2781,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 5
-}
\ No newline at end of file
+}