diff --git a/slither/core/source_mapping/source_mapping.py b/slither/core/source_mapping/source_mapping.py
index 2a0ffa6a6..c4df7ff24 100644
--- a/slither/core/source_mapping/source_mapping.py
+++ b/slither/core/source_mapping/source_mapping.py
@@ -19,12 +19,12 @@ class SourceMapping(Context):
             Not done in an efficient way
         """
         total_length = len(source_code)
-        source_code = source_code.split('\n')
+        source_code = source_code.splitlines(True)
         counter = 0
         i = 0
         lines = []
         while counter < total_length:
-            counter += len(source_code[i]) +1
+            counter += len(source_code[i])
             i = i+1
             if counter > start:
                 lines.append(i)
diff --git a/slither/solc_parsing/slitherSolc.py b/slither/solc_parsing/slitherSolc.py
index c2bffdd4c..5fa3c160e 100644
--- a/slither/solc_parsing/slitherSolc.py
+++ b/slither/solc_parsing/slitherSolc.py
@@ -89,7 +89,7 @@ class SlitherSolc(Slither):
         if 'sourcePaths' in data_loaded:
             for sourcePath in data_loaded['sourcePaths']:
                 if os.path.isfile(sourcePath):
-                    with open(sourcePath, encoding='utf8') as f:
+                    with open(sourcePath, encoding='utf8', newline='') as f:
                         source_code = f.read()
                     self.source_code[sourcePath] = source_code
 
@@ -152,13 +152,13 @@ class SlitherSolc(Slither):
 
         self._source_units[sourceUnit] = name
         if os.path.isfile(name) and not name in self.source_code:
-            with open(name, encoding='utf8') as f:
+            with open(name, encoding='utf8', newline='') as f:
                 source_code = f.read()
             self.source_code[name] = source_code
         else:
             lib_name = os.path.join('node_modules', name)
             if os.path.isfile(lib_name) and not name in self.source_code:
-                with open(lib_name, encoding='utf8') as f:
+                with open(lib_name, encoding='utf8', newline='') as f:
                     source_code = f.read()
                 self.source_code[name] = source_code