diff --git a/requirements.txt b/requirements.txt
index 445f538..62674fb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-RXPY==0.1.0
-wxpython==4.0.0b1
-Pillow==4.3.0
-psutil==5.4.2
+RXPY>=0.1.0
+wxpython>=4.0.0b1
+Pillow>=4.3.0
+psutil>=5.4.2