diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 600509be1..0d6e7790e 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -9,6 +9,8 @@ repos:
   - id: end-of-file-fixer
   - id: check-yaml
   - id: check-added-large-files
+  - id: check-ast
+  - id: check-merge-conflict
 - repo: https://github.com/astral-sh/ruff-pre-commit
   rev: v0.9.6
   hooks:
diff --git a/python/ShipGeoConfig.py b/python/ShipGeoConfig.py
index 969b94293..28d4fddc3 100644
--- a/python/ShipGeoConfig.py
+++ b/python/ShipGeoConfig.py
@@ -9,7 +9,7 @@ def expand_env(string):
     $HOME/bin -> /home/user/bin
     """
     while True:
-        m = re.search("(\${*(\w+)}*)", string)
+        m = re.search(r"(\${*(\w+)}*)", string)
         if m is None:
             break
         (env_token, env_name) = m.groups()
diff --git a/python/rpvsusy.py b/python/rpvsusy.py
index 745fd049c..106e9b84e 100644
--- a/python/rpvsusy.py
+++ b/python/rpvsusy.py
@@ -1,4 +1,4 @@
-"""
+r"""
 # ==================================================================
 #   Python module
 #
@@ -147,7 +147,7 @@ class RPVSUSYbranchings():
     Lifetime and total and partial decay widths of an RPV neutralino
     """
     def __init__(self, mass, couplings, sfmass, benchmark,debug=False):
-        """
+        r"""
         Initialize with mass and couplings of the RPV neutralino
 
         Inputs:
@@ -311,7 +311,7 @@ def NdecayWidth(self):
         Returns the total SUSYRPV neutralino decay width
         """
         declist    = self.decays[self.bench]
-        hadlist    = [re.search('->\ (.+?)\ ',dec).group(1) for dec in declist]
+        hadlist = [re.search(r'->\ (.+?)\ ', dec).group(1) for dec in declist]
         leplist    = [dlist[1].strip() for dlist in [re.findall(r"\ \w+",dec) for dec in declist]]
         print(leplist,hadlist)
         totalwidth = sum([self.Width_H_L(hadlist[i],leplist[i]) for i in range(0,len(hadlist))])
@@ -322,7 +322,7 @@ def NprodWidth(self):
         Returns the total SUSYRPV neutralino production width
         """
         declist    = self.prods[self.bench]
-        hadlist    = [re.search('(.+?)\ ->',dec).group(1) for dec in declist]
+        hadlist = [re.search(r'(.+?)\ ->', dec).group(1) for dec in declist]
         leplist    = [dlist[1].strip() for dlist in [re.findall(r"\ \w+",dec) for dec in declist]]
         totalwidth = sum([self.Width_N_L(hadlist[i],leplist[i]) for i in range(0,len(hadlist))])
         return totalwidth
@@ -335,7 +335,7 @@ def findDecayBranchingRatio(self, decayString):
         Inputs:
         - decayString is a string describing the decay, in the form 'N -> stuff1 ... stuffN'
         """
-        had        = re.search('->\ (.+?)\ ',decayString).group(1)
+        had = re.search(r'->\ (.+?)\ ', decayString).group(1)
         decaysplit = decayString.split(' ')
         for split in decaysplit:
             if split.find('mu')>-1 or split.find('e')>-1 or split.find('tau')>-1:
@@ -377,7 +377,7 @@ def findProdBranchingRatio(self, decayString):
         Inputs:
         - decayString is a string describing the decay, in the form 'H -> N ... stuffN'
         """
-        had    = re.search('(.+?)\ ->',decayString).group(1)
+        had = re.search(r'(.+?)\ ->', decayString).group(1)
         decaysplit = decayString.split(' ')
         for split in decaysplit:
             if split.find('mu')>-1 or split.find('e')>-1 or split.find('tau')>-1:
@@ -413,7 +413,7 @@ class RPVSUSY(RPVSUSYbranchings):
     SUSY RPV neutralino  physics according to the nuMSM
     """
     def __init__(self, mass, couplings, sfmass, benchmark, debug=False):
-        """
+        r"""
         Initialize with mass and couplings of the HNL
 
         Inputs: