diff --git a/requirements.txt b/requirements.txt
index c77d651..631e4d2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,13 +1,13 @@
-Adafruit-Thermal==1.1.0
-Click==7.0
-Flask==1.0.2
-Flask-Limiter==1.0.1
-itsdangerous==0.24
-Jinja2==2.10
-limits==1.3
-MarkupSafe==1.0
-Pillow==5.3.0
-pyserial==3.4
-six==1.11.0
-Unidecode==1.0.22
-Werkzeug==0.14.1
+Adafruit-Thermal>=1.1.0
+Click>=7.0
+Flask>=1.0.2
+Flask-Limiter>=1.0.1
+itsdangerous>=0.24
+Jinja2>=2.10
+limits>=1.3
+MarkupSafe>=1.0
+Pillow>=5.3.0
+pyserial>=3.4
+six>=1.11.0
+Unidecode>=1.0.22
+Werkzeug>=0.14.1