diff --git a/spikelab/requirements.txt b/spikelab/requirements.txt
index a594ff6..20f4faa 100644
--- a/spikelab/requirements.txt
+++ b/spikelab/requirements.txt
@@ -2,7 +2,7 @@ Cython==0.22
 h5py==2.5.0
 matplotlib==1.4.3
 nose==1.3.6
-numpy==1.9.2
+numpy==1.21.0
 pandas==0.16.1
 pyparsing==2.0.3
 python-dateutil==2.4.2