diff --git a/extensions/format_details.py b/extensions/format_details.py
index e1a81b09..5fe682e3 100644
--- a/extensions/format_details.py
+++ b/extensions/format_details.py
@@ -22,7 +22,7 @@ def run(self, lines):
                     # it in the required format.
 
                     details = 1
-                    match = re.search('\[details=(.+)\]', line)
+                    match = re.search(r'\[details=(.+)\]', line)
                     if match:
                         new_lines.append("??? details "+match.group(1)+"\n")
                     else:
@@ -52,5 +52,5 @@ def run(self, lines):
 
 class FormatDetailsExtension (Extension):
 
-    def extendMarkdown(self, md, md_globals):
-        md.preprocessors.add('formatdetails', FixFormatting(md), '_begin')
+    def extendMarkdown(self, md):
+        md.preprocessors.register(FixFormatting(md), 'formatdetails', 9999)
diff --git a/extensions/include_toc.py b/extensions/include_toc.py
index 7d2e3f76..dfa937a1 100644
--- a/extensions/include_toc.py
+++ b/extensions/include_toc.py
@@ -38,5 +38,5 @@ def run(self, lines):
 
 class IncludeToCExtension (Extension):
 
-    def extendMarkdown(self, md, md_globals):
-        md.preprocessors.add('includetoc', InsertToCStuff(md), '_begin')
+    def extendMarkdown(self, md):
+        md.preprocessors.register(InsertToCStuff(md), 'includetoc', 9999)