diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 7809c2a9..04804108 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -11,3 +11,16 @@ updates:
       prefix: ⬆️
     schedule:
       interval: weekly
+
+  - package-ecosystem: "conda"
+    directory: "/"
+    commit-message:
+      prefix: ⬆️
+    schedule:
+      interval: weekly
+    ignore:
+      - dependency-name: "jupyter-book"
+        versions: [">=2.0"]
+      - dependency-name: "python"
+        # Python version should be constrained by the anaconda distribution version
+        versions: [">0"]
diff --git a/.github/workflows/cache-windows.yml b/.github/workflows/cache-windows.yml
index cfeb245f..0b0ec475 100644
--- a/.github/workflows/cache-windows.yml
+++ b/.github/workflows/cache-windows.yml
@@ -17,7 +17,7 @@ jobs:
           auto-update-conda: true
           auto-activate-base: true
           miniconda-version: 'latest'
-          python-version: "3.12"
+          python-version: "3.13"
           environment-file: environment.yml
           activate-environment: quantecon
       - name: Build HTML
diff --git a/.github/workflows/cache.yml b/.github/workflows/cache.yml
index 3529b4ef..e0b3fbb3 100644
--- a/.github/workflows/cache.yml
+++ b/.github/workflows/cache.yml
@@ -15,7 +15,7 @@ jobs:
           auto-update-conda: true
           auto-activate-base: true
           miniconda-version: 'latest'
-          python-version: "3.12"
+          python-version: "3.13"
           environment-file: environment.yml
           activate-environment: quantecon
       - name: graphviz Support # TODO: required?
diff --git a/.github/workflows/ci-windows.yml b/.github/workflows/ci-windows.yml
index d899a909..b71625ac 100644
--- a/.github/workflows/ci-windows.yml
+++ b/.github/workflows/ci-windows.yml
@@ -12,7 +12,7 @@ jobs:
           auto-update-conda: true
           auto-activate-base: true
           miniconda-version: 'latest'
-          python-version: "3.12"
+          python-version: "3.13"
           environment-file: environment.yml
           activate-environment: quantecon
       - name: Download "build" folder (cache)
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 918e6633..fbc3fa2e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
           auto-update-conda: true
           auto-activate-base: true
           miniconda-version: 'latest'
-          python-version: "3.12"
+          python-version: "3.13"
           environment-file: environment.yml
           activate-environment: quantecon
       - name: Graphics Support #TODO: Review if graphviz is needed
@@ -37,13 +37,13 @@ jobs:
       - name: Display Pip Versions
         shell: bash -l {0}
         run: pip list
-      - name: Download "build" folder (cache)
-        uses: dawidd6/action-download-artifact@v11
-        with:
-          workflow: cache.yml
-          branch: main
-          name: build-cache
-          path: _build
+      # - name: Download "build" folder (cache)
+      #   uses: dawidd6/action-download-artifact@v11
+      #   with:
+      #     workflow: cache.yml
+      #     branch: main
+      #     name: build-cache
+      #     path: _build
       # # Build Assets (Download Notebooks and PDF via LaTeX)
       # - name: Build PDF from LaTeX
       #   shell: bash -l {0}
diff --git a/.github/workflows/linkcheck.yml b/.github/workflows/linkcheck.yml
index a9c8ada1..a693db65 100644
--- a/.github/workflows/linkcheck.yml
+++ b/.github/workflows/linkcheck.yml
@@ -13,7 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu-latest"]
-        python-version: ["3.12"]
+        python-version: ["3.13"]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -23,7 +23,7 @@ jobs:
           auto-update-conda: true
           auto-activate-base: true
           miniconda-version: 'latest'
-          python-version: "3.12"
+          python-version: "3.13"
           environment-file: environment.yml
           activate-environment: quantecon
       - name: Download "build" folder (cache)
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index bd555752..1d4ca591 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -16,7 +16,7 @@ jobs:
           auto-update-conda: true
           auto-activate-base: true
           miniconda-version: 'latest'
-          python-version: "3.12"
+          python-version: "3.13"
           environment-file: environment.yml
           activate-environment: quantecon
       - name: Install latex dependencies
diff --git a/environment.yml b/environment.yml
index fa86041a..c0d26ddd 100644
--- a/environment.yml
+++ b/environment.yml
@@ -2,12 +2,12 @@ name: quantecon
 channels:
   - default
 dependencies:
-  - python=3.12
-  - anaconda=2024.10
+  - python=3.13
+  - anaconda=2025.12
   - pip
   - pip:
-    - jupyter-book==1.0.3
-    - quantecon-book-theme==0.8.2
+    - jupyter-book>=1.0.4post1,<2.0
+    - quantecon-book-theme==0.15.1
     - sphinx-tojupyter==0.3.0
     - sphinxext-rediraffe==0.2.7
     - sphinx-reredirects==0.1.4
diff --git a/lectures/_config.yml b/lectures/_config.yml
index cc60f508..83ea53d2 100644
--- a/lectures/_config.yml
+++ b/lectures/_config.yml
@@ -47,6 +47,7 @@ sphinx:
     nb_render_image_options:
       width: 80%
     nb_code_prompt_show: "Show {type}"
+    nb_merge_streams: true
     suppress_warnings: [mystnb.unknown_mime_type, myst.domains]
     # -------------
     html_js_files:
@@ -65,6 +66,7 @@ sphinx:
       header_organisation: QuantEcon
       repository_url: https://github.com/QuantEcon/lecture-intro.zh-cn
       nb_repository_url: https://github.com/QuantEcon/lecture-intro.zh-cn.notebooks
+      path_to_docs: lectures
       download_nb_path: https://quantecon.github.io/lecture-intro.zh-cn
       twitter: quantecon
       twitter_logo_url: https://assets.quantecon.org/img/qe-twitter-logo.png