diff --git a/appveyor.yml b/appveyor.yml
index 1e4fce96..a3ccdf13 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -15,27 +15,16 @@ environment:
   matrix:
     - PYTHON_VERSION: "2.7"
       PYTHON_ARCH: "64"
-      PANDAS_VERSION: "0.16.1"
-      NUMPY_VERSION: "1.9.2"
-      SCIPY_VERSION: "0.15.1"
+      PANDAS_VERSION: "0.18.1"
+      NUMPY_VERSION: "1.11"
+      SCIPY_VERSION: "0.18.0"
 
     - PYTHON_VERSION: "3.4"
       PYTHON_ARCH: "64"
-      PANDAS_VERSION: "0.16.1"
-      NUMPY_VERSION: "1.9.2"
-      SCIPY_VERSION: "0.15.1"
+      PANDAS_VERSION: "0.18.1"
+      NUMPY_VERSION: "1.11"
+      SCIPY_VERSION: "0.18.0"
 
-    - PYTHON_VERSION: "2.7"
-      PYTHON_ARCH: "64"
-      PANDAS_VERSION: "0.17.1"
-      NUMPY_VERSION: "1.10.4"
-      SCIPY_VERSION: "0.16.1"
-
-    - PYTHON_VERSION: "3.4"
-      PYTHON_ARCH: "64"
-      PANDAS_VERSION: "0.17.1"
-      NUMPY_VERSION: "1.10.4"
-      SCIPY_VERSION: "0.16.1"
 
 # We always use a 64-bit machine, but can build x86 distributions
 # with the PYTHON_ARCH variable (which is used by CMD_IN_ENV).