diff --git a/pdfminer/ccitt.py b/pdfminer/ccitt.py
index 5c7f695..7e2dcb3 100644
--- a/pdfminer/ccitt.py
+++ b/pdfminer/ccitt.py
@@ -698,12 +698,12 @@ class CCITTFaxDecoder(CCITTG4Parser):
         return self._buf
 
     def output_line(self, y, bits):
-        bytes = array.array('B', [0]*((len(bits)+7)/8))
+        bytes = array.array('B', [0]*((len(bits)+7)//8))
         if self.reversed:
             bits = [1-b for b in bits]
         for (i, b) in enumerate(bits):
             if b:
-                bytes[i/8] += (128, 64, 32, 16, 8, 4, 2, 1)[i % 8]
+                bytes[i//8] += (128, 64, 32, 16, 8, 4, 2, 1)[i % 8]
         self._buf += bytes.tostring()
         return
 
diff --git a/pdfminer/cmapdb.py b/pdfminer/cmapdb.py
index b18df98..ca39b86 100644
--- a/pdfminer/cmapdb.py
+++ b/pdfminer/cmapdb.py
@@ -96,7 +96,7 @@ class IdentityCMap(object):
         return self.vertical
 
     def decode(self, code):
-        n = len(code)/2
+        n = len(code)//2
         if n:
             return struct.unpack('>%dH' % n, code)
         else:
diff --git a/pdfminer/image.py b/pdfminer/image.py
index 8ffed29..9dfc9a1 100644
--- a/pdfminer/image.py
+++ b/pdfminer/image.py
@@ -7,7 +7,7 @@ from pdfcolor import LITERAL_DEVICE_GRAY, LITERAL_DEVICE_RGB, LITERAL_DEVICE_CMY
 
 
 def align32(x):
-    return ((x+3)/4)*4
+    return ((x+3)//4)*4
 
 
 ##  BMPWriter
@@ -27,7 +27,7 @@ class BMPWriter(object):
             ncols = 0
         else:
             raise ValueError(bits)
-        self.linesize = align32((self.width*self.bits+7)/8)
+        self.linesize = align32((self.width*self.bits+7)//8)
         self.datasize = self.linesize * self.height
         headersize = 14+40+ncols*4
         info = struct.pack('<IiiHHIIIIII', 40, self.width, self.height, 1, self.bits, 0, self.datasize, 0, 0, ncols, 0)
@@ -94,7 +94,7 @@ class ImageWriter(object):
             bmp = BMPWriter(fp, 1, width, height)
             data = stream.get_data()
             i = 0
-            width = (width+7)/8
+            width = (width+7)//8
             for y in xrange(height):
                 bmp.write_line(y, data[i:i+width])
                 i += width
diff --git a/pdfminer/layout.py b/pdfminer/layout.py
index 913a55e..4dfd61b 100644
--- a/pdfminer/layout.py
+++ b/pdfminer/layout.py
@@ -215,7 +215,7 @@ class LTChar(LTComponent, LTText):
             width = font.get_width() * fontsize
             (vx, vy) = textdisp
             if vx is None:
-                vx = width/2
+                vx = width//2
             else:
                 vx = vx * fontsize * .001
             vy = (1000 - vy) * fontsize * .001
diff --git a/pdfminer/pdfdocument.py b/pdfminer/pdfdocument.py
index 5dd2b9e..7c153a6 100644
--- a/pdfminer/pdfdocument.py
+++ b/pdfminer/pdfdocument.py
@@ -190,7 +190,7 @@ class PDFXRefFallback(PDFXRef):
                         objs.append(obj)
                 except PSEOF:
                     pass
-                n = min(n, len(objs)/2)
+                n = min(n, len(objs)//2)
                 for index in xrange(n):
                     objid1 = objs[index*2]
                     self.offsets[objid1] = (objid, index, 0)
@@ -369,8 +369,8 @@ class PDFDocument(object):
         if 3 <= R:
             # 8
             for _ in xrange(50):
-                hash = md5.md5(hash.digest()[:length/8])
-        key = hash.digest()[:length/8]
+                hash = md5.md5(hash.digest()[:length//8])
+        key = hash.digest()[:length//8]
         if R == 2:
             # Algorithm 3.4
             u1 = Arcfour(key).process(self.PASSWORD_PADDING)
diff --git a/pdfminer/pdffont.py b/pdfminer/pdffont.py
index e4d2dd7..2a45f58 100644
--- a/pdfminer/pdffont.py
+++ b/pdfminer/pdffont.py
@@ -397,8 +397,8 @@ class TrueTypeFont(object):
                 subheaderkeys = struct.unpack('>256H', fp.read(512))
                 firstbytes = [0]*8192
                 for (i, k) in enumerate(subheaderkeys):
-                    firstbytes[k/8] = i
-                nhdrs = max(subheaderkeys)/8 + 1
+                    firstbytes[k//8] = i
+                nhdrs = max(subheaderkeys)//8 + 1
                 hdrs = []
                 for i in xrange(nhdrs):
                     (firstcode, entcount, delta, offset) = struct.unpack('>HHhH', fp.read(8))
@@ -415,7 +415,7 @@ class TrueTypeFont(object):
                         char2gid[first+c] = gid
             elif fmttype == 4:
                 (segcount, _1, _2, _3) = struct.unpack('>HHHH', fp.read(8))
-                segcount /= 2
+                segcount //= 2
                 ecs = struct.unpack('>%dH' % segcount, fp.read(2*segcount))
                 fp.read(2)
                 scs = struct.unpack('>%dH' % segcount, fp.read(2*segcount))
diff --git a/pdfminer/rijndael.py b/pdfminer/rijndael.py
index 83e9b47..6216737 100644
--- a/pdfminer/rijndael.py
+++ b/pdfminer/rijndael.py
@@ -14,15 +14,15 @@ import struct
 
 
 def KEYLENGTH(keybits):
-    return (keybits)/8
+    return (keybits)//8
 
 
 def RKLENGTH(keybits):
-    return (keybits)/8+28
+    return (keybits)//8+28
 
 
 def NROUNDS(keybits):
-    return (keybits)/32+6
+    return (keybits)//32+6
 
 Te0 = [
     0xc66363a5L, 0xf87c7c84L, 0xee777799L, 0xf67b7b8dL,
diff --git a/pdfminer/utils.py b/pdfminer/utils.py
index e835a07..5329640 100644
--- a/pdfminer/utils.py
+++ b/pdfminer/utils.py
@@ -12,7 +12,7 @@ def apply_png_predictor(pred, colors, columns, bitspercomponent, data):
     if bitspercomponent != 8:
         # unsupported
         raise ValueError(bitspercomponent)
-    nbytes = colors*columns*bitspercomponent/8
+    nbytes = colors*columns*bitspercomponent//8
     i = 0
     buf = ''
     line0 = '\x00' * columns
@@ -39,7 +39,7 @@ def apply_png_predictor(pred, colors, columns, bitspercomponent, data):
             # PNG average (UNTESTED)
             c = 0
             for (a, b) in zip(line0, line1):
-                c = ((c+ord(a)+ord(b))/2) & 255
+                c = ((c+ord(a)+ord(b))//2) & 255
                 buf += chr(c)
         else:
             # unsupported
@@ -114,7 +114,7 @@ def fsplit(pred, objs):
 def drange(v0, v1, d):
     """Returns a discrete range."""
     assert v0 < v1
-    return xrange(int(v0)/d, int(v1+d)/d)
+    return xrange(int(v0)//d, int(v1+d)//d)
 
 
 # get_bound