diff --git a/scdata/io/csv.py b/scdata/io/csv.py
index 2c8a9e80..dd53dabb 100644
--- a/scdata/io/csv.py
+++ b/scdata/io/csv.py
@@ -68,7 +68,8 @@ def read_csv_file(file_path, timezone, frequency, clean_na = None, index_name =
 
     # Read pandas dataframe
 
-    df = read_csv(file_path, verbose = False, skiprows = skiprows, sep = ',', encoding = encoding)
+    df = read_csv(file_path, verbose = False, skiprows = skiprows, sep = sep,
+                  encoding = encoding, encoding_errors='ignore')
 
     flag_found = False
     if type(index_name) == str:
@@ -154,7 +155,7 @@ def sdcard_concat(path, output = 'CONCAT.CSV', index_name = 'TIME', keep = True,
             src_path = join(path, file)
 
             try:
-                with open(src_path, 'r', newline = '\n') as csv_file:
+                with open(src_path, 'r', newline = '\n', errors = 'replace') as csv_file:
                     header = csv_file.readlines()[0:4]
             except:
                 ignore_file = True
@@ -179,8 +180,10 @@ def sdcard_concat(path, output = 'CONCAT.CSV', index_name = 'TIME', keep = True,
                         header_tokenized[short_tokenized[index]]['unit'] = unit_tokenized[index]
                         header_tokenized[short_tokenized[index]]['long'] = long_tokenized[index]
                         header_tokenized[short_tokenized[index]]['id'] = id_tokenized[index]
-            
-            temp = read_csv(src_path, verbose=False, skiprows=range(1,4)).set_index("TIME")
+
+            temp = read_csv(src_path, verbose=False, skiprows=range(1,4),
+                            encoding_errors='ignore').set_index("TIME")
+            temp = clean(temp, clean_na='drop', how='all')
             temp.index.rename(index_name, inplace=True)
             concat = concat.combine_first(temp)
 
diff --git a/setup.py b/setup.py
index e817bd08..92f04cdc 100644
--- a/setup.py
+++ b/setup.py
@@ -65,15 +65,15 @@
                         'Jinja2==2.11.2',
                         'matplotlib==3.2.1',
                         'numpy~=1.20.0',
-                        'pandas~=1.0.3',
+                        'pandas>=1.3.0',
                         'pdfrw==0.4',
-                        'PDPbox==0.2.0',
+#                       'PDPbox==0.2.0',
                         'plotly~=4.14.3',
                         'PyYAML==5.3.1',
                         'requests==2.23.0',
                         'reportlab==3.5.*',
                         'scipy~=1.5.0',
-                        'scikit-learn~=0.23.1',
+                        'scikit-learn~=1.0.1',
                         'seaborn==0.10.1',
                         'termcolor==1.1.0',
                         'tqdm~=4.50.2',