diff --git a/md.bqn b/md.bqn
index 12606caa..c84fa394 100644
--- a/md.bqn
+++ b/md.bqn
@@ -382,6 +382,9 @@ Markdown ← {filename𝕊𝕩:
     (1¨ <⊸∾ codeMask⊸GetMultiHighlights)⊸Modify 𝕩
   }⟜JoinLines
   ProcHtmlBlock ← extensions◶JoinLines‿(<⟜2◶ProcComment‿ProcHtml)
+  
+  # Thematic Breaks
+  ProcBreak ← ∾("<hr />"∾lf)¨
 
   dig ← '0'+↕10
   [lineChars,lineClas,procFns] ← ⍉[
@@ -392,6 +395,7 @@ Markdown ← {filename𝕊𝕩:
     "-+*" ‿ LenBullet   ‿ ProcBullet
   # dig   ‿ LenListNum  ‿ ProcListNum
     "<"   ‿ IsHtmlBlock ‿ ProcHtmlBlock
+    ""    ‿ 0           ‿ ProcBreak
   ]
 
   ######
@@ -541,6 +545,10 @@ Markdown ← {filename𝕊𝕩:
   # part of a code block, it will be included in a paragraph.
   lineType -↩ codeMask ∧ 1 = lineType
 
+  # Lines that are thematic breaks
+  breakMask ← nonEmptyMask ∧ (blanks ≤ 3) ∧ {(3≤+´⊏0∾˜˘⌾⍉bw/nw)∧∨´bw←∧´˘(𝕩∊" 	")⊸∨˘nw←"*-_"=⌜𝕩}¨𝕩
+  lineType 6¨⌾(breakMask⊸/)↩
+  
   # Tables are made up of rows that would otherwise be paragraph rows.
   # They are indicated by the delimiter row, consisting of only a few
   # allowed characters, preceded (!) by a header row with the same
diff --git a/test/markdown.bqn b/test/markdown.bqn
index e87b3f30..013b214d 100755
--- a/test/markdown.bqn
+++ b/test/markdown.bqn
@@ -15,7 +15,7 @@ UnEscape ← {
 }
 RunTest ← {
   in‿exp ← UnEscape∘(1↓¯1↓⊢)¨2↑𝕩
-  out ← 0 Markdown (@+10) ((⊢-˜¬×+`)∘=⊔⊢) in
+  out ← 0 Markdown⎊("Runtime Error:"∾•Fmt∘⊢) (@+10) ((⊢-˜¬×+`)∘=⊔⊢) in
   ⟨exp≡out,in,exp,out,2⊑𝕩⟩
 }