diff --git a/python-fslpy.spec b/python-fslpy.spec
index 4c975e6..89a8597 100644
--- a/python-fslpy.spec
+++ b/python-fslpy.spec
@@ -28,6 +28,7 @@ BuildRequires:  %{py3_dist h5py}
 BuildRequires:  %{py3_dist nibabel} > 2.2.1
 BuildRequires:  %{py3_dist deprecation}
 BuildRequires:  %{py3_dist wxpython}
+BuildRequires:  %{py3_dist pillow}
 BuildRequires:  xorg-x11-server-Xvfb
 BuildRequires:  dcm2niix