diff --git a/lib/substitutions.json b/lib/substitutions.json
index 3c6072f..96859db 100644
--- a/lib/substitutions.json
+++ b/lib/substitutions.json
@@ -7244,6 +7244,10 @@
     {
       "before": "Hardboil",
       "after": "Hard Boil"
+    },
+    {
+      "before": "after class in Math, my",
+      "after": "after class in math, my"
     }
   ],
   "https://www.parahumans.net/2019/08/20/from-within-16-3/": [
@@ -7322,6 +7326,12 @@
       "after": "egg for Crystal and Mom"
     }
   ],
+  "https://www.parahumans.net/2019/10/08/sundown-17-3/": [
+    {
+      "before": "say, Math class",
+      "after": "say, math class"
+    }
+  ],
   "https://www.parahumans.net/2019/10/12/sundown-17-4/": [
     {
       "before": "on resisting Master influence",