diff --git a/CHANGELOG.md b/CHANGELOG.md
index 79d5e8e..ffec0df 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,8 @@ New Features:
 
 Bug Fixes:
 
-* Fixed an invalid method call in `bgv2json` (#82, @nirvdrum).
+* Fixed an invalid method call in `bgv2json` (#79, @nirvdrum).
+* Fixed a character escape issue with the Mermaid formatter that could result in invalid syntax (#87, @nirvdrum).
 
 Changes:
 
@@ -28,7 +29,7 @@ Changes:
 * Removed hidden nodes from the `describe` command output (#66, @chrisseaton).
 * Improved the `describe` command output to ignore hidden nodes (@chrisseaton).
 * Added more “triggers” to detect if we’re looking at Graal or Truffle graphs (as opposed to regular JVM graphs) (@chrisseaton).
-* Support simplifying more allocation node classes (#73, @nirvdrum).
+* Support simplifying more allocation node classes (#67, @nirvdrum).
 
 
 # 0.14
diff --git a/lib/seafoam/mermaid_writer.rb b/lib/seafoam/mermaid_writer.rb
index ae58c35..807a3ee 100644
--- a/lib/seafoam/mermaid_writer.rb
+++ b/lib/seafoam/mermaid_writer.rb
@@ -38,7 +38,7 @@ def output_node(indent, id, attrs)
       when "diamond"
         shape = ["{{", "}}"]
       end
-      @stream.puts "#{indent}#{id}#{shape[0]}#{attrs[:label].inspect}#{shape[1]}"
+      @stream.puts "#{indent}#{id}#{shape[0]}#{attrs[:label].gsub('"', "#quot;").inspect}#{shape[1]}"
       @stream.puts "#{indent}style #{id} fill:#{attrs[:fillcolor]},stroke:#{attrs[:color]},color:#{attrs[:fontcolor]};"
     end
 
diff --git a/spec/seafoam/mermaid_write_spec.rb b/spec/seafoam/mermaid_write_spec.rb
index ec98093..d2946a2 100644
--- a/spec/seafoam/mermaid_write_spec.rb
+++ b/spec/seafoam/mermaid_write_spec.rb
@@ -44,5 +44,20 @@
         end
       end
     end
+
+    it "escapes quotes in labels" do
+      attrs = {
+        color: "black",
+        fillcolor: "#f9f9f9",
+        fontcolor: "#1a1919",
+        fontname: "Arial",
+        label: "\"abc\"",
+        shape: "rectangle",
+        style: "filled",
+      }
+
+      @writer.send(:output_node, "", "node0", attrs)
+      expect(@stream.string).to(include("node0(\"#quot;abc#quot;\")"))
+    end
   end
 end