diff --git a/.github/workflows/deploy-book.yml b/.github/workflows/deploy-book.yml
index 316b60c..5a25593 100644
--- a/.github/workflows/deploy-book.yml
+++ b/.github/workflows/deploy-book.yml
@@ -18,20 +18,25 @@ jobs:
       uses: actions/setup-python@v4
       with:
         python-version: 3.9
+    - name: Upgrade pip
+      run: python3 -m pip install --upgrade pip setuptools wheel
 
-    - name: Setup Miniconda
-      uses: conda-incubator/setup-miniconda@v2.2.0
+    - name: Cache dependencies
+      uses: actions/cache@v2
       with:
-        environment-file: environment.yml
-        activate-environment: me373-book
-        python-version: 3.9
-        auto-activate-base: false
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/freeze.txt') }}
+        restore-keys: ${{ runner.os }}-pip-
+    
+    - name: Install dependencies
+      run: |
+        python3 -m pip install --no-deps -r freeze.txt
 
     # Build the book
     - name: Build the book
       shell: bash -l {0}
       run: |
-        jupyter-book build book
+        jupyter-book build book -vv
 
     # Push the book's HTML to github-pages
     - name: GitHub Pages action
diff --git a/environment.yml b/environment.yml
index 25347d4..c3a4246 100644
--- a/environment.yml
+++ b/environment.yml
@@ -7,3 +7,4 @@ dependencies:
   - numpy
   - scipy
   - matplotlib
+  - sympy
diff --git a/requirements.txt b/requirements.txt
index 0c9dae2..d8f956d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,6 @@
 numpy
 scipy
 matplotlib
-nbinteract
-scipy
 jupyter-book
+sympy
+sphinx>=4.0,<5.0