diff --git a/pretext/__init__.py b/pretext/__init__.py
index 98a6a60f..032ea12b 100644
--- a/pretext/__init__.py
+++ b/pretext/__init__.py
@@ -19,7 +19,7 @@
 VERSION = get_version("pretext", Path(__file__).parent.parent)
 
 
-CORE_COMMIT = "d95a31b8ed95f8152b8fe66ddf8754f62ad65e24"
+CORE_COMMIT = "ee1a38ac87338458c84a5a662c5bbbf57b4b1ede"
 
 
 def activate() -> None:
diff --git a/pretext/constants.py b/pretext/constants.py
index 7de74be5..adcefae0 100644
--- a/pretext/constants.py
+++ b/pretext/constants.py
@@ -225,7 +225,7 @@
         "latex-image": ["png"],
         "sageplot": ["png"],
         "prefigure": ["png"],
-        "mermaid": ["svg"],
+        "mermaid": ["png"],
     },
     "braille": {
         "asymptote": ["all"],