diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index f34c217..ac93758 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -58,12 +58,20 @@ steps:
   displayName: 'Upgrade pip and setuptools'
 
 - powershell: |
-    $mirror = "https://download.lfd.uci.edu/pythonlibs/r7aykn4w"
+    $mirror = "https://download.lfd.uci.edu/pythonlibs/s2jqpv5t/cp3$(python.version.minor)"
     $wheel = "bsddb3-6.2.6-cp3$(python.version.minor)-cp3$(python.version.minor)m-win_amd64.whl"
     Invoke-WebRequest -Uri "$mirror/$wheel" -OutFile "$(Agent.TempDirectory)\$wheel"
     pip install "$(Agent.TempDirectory)\$wheel"
-  condition: and(eq(variables['python.version.major'], '3'), eq(variables['os.image'], 'windows-latest'))
-  displayName: 'Install bsddb3 wheel'
+  condition: and(eq(variables['python.version.major'], '3'), eq(variables['os.image'], 'windows-latest'), eq(variables['python.version.minor'], '5'))
+  displayName: 'Install bsddb3 wheel (3.5)'
+
+- powershell: |
+    $mirror = "https://download.lfd.uci.edu/pythonlibs/s2jqpv5t"
+    $wheel = "bsddb3-6.2.7-cp3$(python.version.minor)-cp3$(python.version.minor)m-win_amd64.whl"
+    Invoke-WebRequest -Uri "$mirror/$wheel" -OutFile "$(Agent.TempDirectory)\$wheel"
+    pip install "$(Agent.TempDirectory)\$wheel"
+  condition: and(eq(variables['python.version.major'], '3'), eq(variables['os.image'], 'windows-latest'), ge(variables['python.version.minor'], '6'))
+  displayName: 'Install bsddb3 wheel (3.6+)'
 
 - script: |
     brew install berkeley-db4
diff --git a/setup.py b/setup.py
index 7e2e521..a4806d6 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@
 
 install_requires = [
     'future>=0.15.2',
-    'rdflib>=4.2.0',
+    'rdflib>=4.2.0,<5.0.0',
     'requests>=2.5.1',
     'six>=1.10.0',
     'setuptools>=18.5',