diff --git a/src/filters/ppt-dump.py b/src/filters/ppt-dump.py
index d2dcdab9..75aca1c3 100755
--- a/src/filters/ppt-dump.py
+++ b/src/filters/ppt-dump.py
@@ -6,7 +6,7 @@
 #
 
 import sys, os.path, getopt, traceback
-sys.path.append(sys.path[0]+"/msodump.zip")
+sys.path.insert(0, sys.path[0]+"/msodump.zip")
 from msodumper import ole, pptstream, globals, olestream
 from msodumper.globals import error
 
diff --git a/src/filters/rclepub b/src/filters/rclepub
index 61f5dfc1..1276fc74 100755
--- a/src/filters/rclepub
+++ b/src/filters/rclepub
@@ -12,7 +12,7 @@ import subprocess
 import rclexecm
 import rclconfig
 
-sys.path.append(sys.path[0]+"/recollepub.zip")
+sys.path.insert(0, sys.path[0]+"/recollepub.zip")
 try:
     import epub
 except:
diff --git a/src/filters/xls-dump.py b/src/filters/xls-dump.py
index 4aefef80..f5d7672a 100755
--- a/src/filters/xls-dump.py
+++ b/src/filters/xls-dump.py
@@ -6,7 +6,7 @@
 #
 from builtins import range
 import sys, os.path, optparse
-sys.path.append(sys.path[0]+"/msodump.zip")
+sys.path.insert(0, sys.path[0]+"/msodump.zip")
 import traceback
 
 from msodumper import ole, xlsstream, globals, node, xlsmodel, olestream