diff --git a/conda-recipe/meta.yaml b/conda-recipe/meta.yaml
index d410ec0..f61c214 100644
--- a/conda-recipe/meta.yaml
+++ b/conda-recipe/meta.yaml
@@ -1,10 +1,10 @@
 package:
   name: nexusformat
-  version: "0.5.0"
+  version: "0.5.1"
 
 source:
   git_url: https://github.com/nexpy/nexusformat.git
-  git_tag: v0.5.0
+  git_tag: v0.5.1
 
 build:
   entry_points:
@@ -16,13 +16,13 @@ requirements:
   build:
     - python
     - setuptools
-    - numpy >=1.6.0
+    - numpy
     - h5py
     - ipython
 
   run:
     - python
-    - numpy >=1.6.0
+    - numpy
     - h5py
 
 test:
diff --git a/requirements.txt b/requirements.txt
index 3936f78..aebd6f7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 h5py
-ipython
 numpy
-scipy
\ No newline at end of file
+scipy
+ipython
diff --git a/setup.py b/setup.py
index 00a12a1..057a32c 100755
--- a/setup.py
+++ b/setup.py
@@ -52,6 +52,7 @@
                      'Programming Language :: Python :: 3.5',
                      'Programming Language :: Python :: 3.6',
                      'Programming Language :: Python :: 3.7',
+                     'Programming Language :: Python :: 3.8',
                      'Topic :: Scientific/Engineering',
                      'Topic :: Scientific/Engineering :: Visualization'],
       )
diff --git a/src/nexusformat/requires.py b/src/nexusformat/requires.py
index c93491b..1b9937a 100644
--- a/src/nexusformat/requires.py
+++ b/src/nexusformat/requires.py
@@ -11,7 +11,7 @@
 #-----------------------------------------------------------------------------
 
 pkg_requirements = [
-    'numpy>=1.6.0',
-    'h5py',
-    'scipy'
+    'numpy',
+    'scipy',
+    'h5py'
 ]