diff --git a/helpers/__init__.py b/helpers/__init__.py
index 2692f5a..21b6988 100644
--- a/helpers/__init__.py
+++ b/helpers/__init__.py
@@ -12,14 +12,14 @@ def makeDir(issue):
   return False
 
 def makePDF(issue, pages):
- cover = PIL.Image.open("%i/1.jpg" % issue)
+ cover = PIL.Image.open("%s/1.jpg" % str(issue))
  x, y = cover.size
 
  pdf = fpdf.FPDF(unit = "pt", format = [x, y])
 
  for page in range(pages):
   pdf.add_page()
-  pdf.image("%i/%i.jpg" % (issue, page + 1), 0, 0)
+  pdf.image("%s/%i.jpg" % (str(issue), page + 1), 0, 0)
 
- pdf.output("%i/issue.pdf" % issue, "F")
+ pdf.output("%s/issue.pdf" % str(issue), "F")