diff --git a/requirements/dev.txt b/requirements/dev.txt
index e74bb3a7..4faf987d 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -1,4 +1,4 @@
 check-manifest >= 0.35
 twine >= 1.8.1
-coverage >= 4.4
+coverage >= 4.5
 GitPython == 2.1.3
diff --git a/requirements/main.txt b/requirements/main.txt
index 8f1fd896..6509cfd3 100644
--- a/requirements/main.txt
+++ b/requirements/main.txt
@@ -2,11 +2,11 @@
 # setup.py lists a separate set of requirements that are looser to simplify
 # installation
 cffi == 1.11.5
-img2pdf == 0.3.0
-pdfminer == 20170720
+img2pdf == 0.3.1
+pdfminer == 20181108
 pikepdf == 0.3.7
 Pillow >= 5.0.0, != 5.1.0 ; sys_platform == "darwin"
-pycparser == 2.18
+pycparser == 2.19
 python-xmp-toolkit == 2.0.1
-reportlab == 3.4.0
-ruffus == 2.7.0
+reportlab == 3.5.9
+ruffus == 2.8.0
diff --git a/requirements/test.txt b/requirements/test.txt
index c1d250b5..6476c892 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -1,4 +1,4 @@
-pytest >= 3.2
+pytest >= 3.10
 pytest-helpers-namespace
 pytest-xdist
 pytest-cov
diff --git a/setup.py b/setup.py
index c2336467..a87a7590 100644
--- a/setup.py
+++ b/setup.py
@@ -250,8 +250,8 @@ setup(
     ],
     install_requires=[
         'cffi >= 1.9.1',          # must be a setup and install requirement
-        'img2pdf >= 0.2.4, < 0.4',       # pure Python, so track HEAD closely
-        'pdfminer.six == 20170720',
+        'img2pdf >= 0.3.0, < 0.4',       # pure Python, so track HEAD closely
+        'pdfminer.six == 20181108',
         'pikepdf >= 0.3.7, < 0.4',
         'Pillow >= 4.0.0, != 5.1.0 ; sys_platform == "darwin"',
                                   # Pillow < 4 has BytesIO/TIFF bug w/img2pdf 0.2.3