diff --git a/db_update.py b/db_update.py
index 2a3b489bb..1be20f270 100644
--- a/db_update.py
+++ b/db_update.py
@@ -544,7 +544,7 @@ def update_db():
                 continue
             typeName = row.get('typeName_en-us', '')
             # Regular sets matching
-            m = re.match('(?P<grade>(High|Mid|Low)-grade) (?P<set>\w+) (?P<implant>(Alpha|Beta|Gamma|Delta|Epsilon|Omega))', typeName, re.IGNORECASE)
+            m = re.match(r'(?P<grade>(High|Mid|Low)-grade) (?P<set>\w+) (?P<implant>(Alpha|Beta|Gamma|Delta|Epsilon|Omega))', typeName, re.IGNORECASE)
             if m:
                 implantSets.setdefault((m.group('grade'), m.group('set')), set()).add(row['typeID'])
             # Special set matching
diff --git a/gui/characterEditor.py b/gui/characterEditor.py
index 2255e61fe..811b23b9d 100644
--- a/gui/characterEditor.py
+++ b/gui/characterEditor.py
@@ -115,7 +115,7 @@ class CharacterEntityEditor(EntityEditor):
         sChar = Character.getInstance()
 
         if entity.alphaCloneID:
-            trimmed_name = re.sub('[ \(\u03B1\)]+$', '', name)
+            trimmed_name = re.sub('[ \\(\u03B1\\)]+$', '', name)
             sChar.rename(entity, trimmed_name)
         else:
             sChar.rename(entity, name)
diff --git a/service/market.py b/service/market.py
index 297bbdf8d..f240ab157 100644
--- a/service/market.py
+++ b/service/market.py
@@ -184,7 +184,7 @@ class SearchWorkerThread(threading.Thread):
     def _prepareRequestNormal(self, request):
         # Escape regexp-specific symbols, and un-escape whitespaces
         request = re.escape(request)
-        request = re.sub(r'\\(?P<ws>\s+)', '\g<ws>', request)
+        request = re.sub(r'\\(?P<ws>\s+)', '\\g<ws>', request)
         # Imitate wildcard search
         request = re.sub(r'\\\*', r'\\w*', request)
         request = re.sub(r'\\\?', r'\\w?', request)