diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 54b5489..d31b6a2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
       - name: Install deps
         run: |
           python -m pip install --upgrade pip
-          pip install -r requirements.txt
+          pip install -r dev-requirements.txt
 
       - name: Run tests
         run: |
diff --git a/README.md b/README.md
index ff94698..29bc619 100644
--- a/README.md
+++ b/README.md
@@ -6,4 +6,3 @@ Using this library, you can create new custom factors and estimate their returns
 
 The only dependencies are numpy and Polars. It supports market, sector and style factors; three styles are included: value, size and momentum. The functions you broadly want to have for constructing more style factors (or custom fundamental factors of any kind) are included.
 
-A writeup that walks through (and motivates) the development of the library can be found in this X article: https://x.com/0xfdf/status/1808351541943763163
diff --git a/dev-requirements.txt b/dev-requirements.txt
index b6b0c60..f487ecb 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1 +1,3 @@
-pytest~=7.4.4
\ No newline at end of file
+pytest~=7.4.4
+numpy~=1.26.2
+polars~=1.0
\ No newline at end of file