diff --git a/katex-convert-unicode.rkt b/katex-convert-unicode.rkt
index c4fd336d3..2862e263a 100644
--- a/katex-convert-unicode.rkt
+++ b/katex-convert-unicode.rkt
@@ -102,10 +102,11 @@
       [∌ "\\notni{}"]
       [ℰ "\\mathcal{E}"]
       [• "\\bullet{}"]
-      [′ "'"]
-      [″ "''"]
-      [‴ "'''"]
-      [⁗ "''''"]
+      [|'| "{}'"]
+      [′ "{}'"]
+      [″ "{}''"]
+      [‴ "{}'''"]
+      [⁗ "{}''''"]
       [⋃ "\\bigcup{}"]
       [⋂ "\\bigcap{}"]
       [⋀ "\\bigwedge{}"]