diff --git a/README.md b/README.md
index 93863b1..80d44ca 100644
--- a/README.md
+++ b/README.md
@@ -142,8 +142,8 @@ source .envspam/bin/activate
 pip3 install -r requirements.txt
 pip3 install -r spam/requirements.txt
 
-# Launch the Jupyter notebook interface
-jupyter notebook spam
+# Launch the Jupyter notebook interface (making sure the right virtual environment is used)
+.envspam/bin/jupyter notebook spam
 ```
 
 </p>
diff --git a/requirements.txt b/requirements.txt
index dda08cb..d9be9e1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,12 +1,12 @@
 #### ESSENTIAL LIBRARIES
 
-snorkel==0.9.5
+snorkel==0.9.9
 
 
 #### DEV TOOLS
 
-black==19.3b0
-flake8==3.7.8
-jupyter==1.0.0
-jupytext==1.2.0
-nbconvert==5.5.0
+black>=19.3b0
+flake8>=3.7.8
+jupyter>=1.0.0
+jupytext>=1.2.0
+nbconvert>=6.5.3
diff --git a/spam/requirements.txt b/spam/requirements.txt
index 8091bd1..79f7c65 100644
--- a/spam/requirements.txt
+++ b/spam/requirements.txt
@@ -1,9 +1,9 @@
-matplotlib==3.1.1
+matplotlib==3.5.3
 names==0.3.0
 nltk==3.4.5
-numpy>=1.16.0,<1.17.0
-pandas>=0.24.0,<0.25.0
+numpy>=1.16.5
+pandas>=1.0.0
 scikit-learn>=0.20.2
 spacy>=2.1.6,<2.2.0
-tensorflow==1.14.0
+tensorflow>=1.14.0
 textblob==0.15.3