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.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-cn.yml b/.github/workflows/ci-cn.yml
index 837f0f62..ed9e3559 100644
--- a/.github/workflows/ci-cn.yml
+++ b/.github/workflows/ci-cn.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-cn.yml
           activate-environment: quantecon
       - name: Graphics Support
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 918e6633..c9c072b9 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
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-cn.yml b/environment-cn.yml
index 3640e08f..97d324a8 100644
--- a/environment-cn.yml
+++ b/environment-cn.yml
@@ -3,18 +3,17 @@ channels:
   - default
   - conda-forge
 dependencies:
-  - python=3.12
-  - anaconda=2024.10
+  - python=3.13
+  - anaconda=2025.12
   - pip
   - pip:
-    - jupyter-book==1.0.3
+    - jupyter-book==1.0.4post1
     - quantecon-book-theme==0.20.2
-    - sphinx-tojupyter==0.3.0
-    - sphinxext-rediraffe==0.2.7
-    - sphinx_reredirects==0.1.4
-    - sphinx-exercise==1.0.1
-    - sphinx-proof==0.2.0
-    - ghp-import==1.1.0
-    - sphinxcontrib-youtube==1.3.0 #Version 1.3.0 is required as quantecon-book-theme is only compatible with sphinx<=5
-    - sphinx-togglebutton==0.3.2
+    - sphinx-tojupyter==0.6.0
+    - sphinxext-rediraffe==0.3.0
+    - sphinx_reredirects==1.1.0
+    - sphinx-exercise==1.2.1
+    - sphinx-proof==0.4.0
+    - sphinxcontrib-youtube==1.5.0
+    - sphinx-togglebutton==0.4.5
     - --index-url https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple
diff --git a/environment.yml b/environment.yml
index cb5d7102..c6d71286 100644
--- a/environment.yml
+++ b/environment.yml
@@ -2,18 +2,17 @@ name: quantecon
 channels:
   - default
 dependencies:
-  - python=3.12
-  - anaconda=2024.10
+  - python=3.13
+  - anaconda=2025.12
   - pip
   - pip:
-    - jupyter-book==1.0.3
+    - jupyter-book==1.0.4post1
     - quantecon-book-theme==0.20.2
-    - sphinx-tojupyter==0.3.0
-    - sphinxext-rediraffe==0.2.7
-    - sphinx-reredirects==0.1.4
-    - sphinx-exercise==1.0.1
-    - sphinx-proof==0.2.0
-    - ghp-import==1.1.0
-    - sphinxcontrib-youtube==1.3.0 #Version 1.3.0 is required as quantecon-book-theme is only compatible with sphinx<=5
-    - sphinx-togglebutton==0.3.2
+    - sphinx-tojupyter==0.6.0
+    - sphinxext-rediraffe==0.3.0
+    - sphinx-reredirects==1.1.0
+    - sphinx-exercise==1.2.1
+    - sphinx-proof==0.4.0
+    - sphinxcontrib-youtube==1.5.0
+    - sphinx-togglebutton==0.4.5
 
diff --git a/lectures/_config.yml b/lectures/_config.yml
index 134ce0e9..4dc154c9 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
       languages:
         - code: en