diff -Naur dblatex-0.3.11py3-orig/lib/dbtexmf/dblatex/rawtex.py dblatex-0.3.11py3/lib/dbtexmf/dblatex/rawtex.py
--- dblatex-0.3.11py3-orig/lib/dbtexmf/dblatex/rawtex.py	2020-01-29 13:48:34.000000000 -0800
+++ dblatex-0.3.11py3/lib/dbtexmf/dblatex/rawtex.py	2020-07-13 23:49:56.296767535 -0700
@@ -101,10 +101,14 @@
 
             # If something done, replace the figure in the tex file
             if newfig != fig:
+                if isinstance(fig, str):
+                    fig = fig.encode("utf-8")
+                if isinstance(newfig, str):
+                    newfig = newfig.encode("utf-8")
                 line = re.sub(br"{"+fig+br"}", br"{"+newfig+br"}", line)
 
         return line
-            
+
 
 def main():
     c = RawLatex()