diff --git a/docs/CONTRIBUTING.md b/docs/CONTRIBUTING.md
index 923e9ca..01f2803 100644
--- a/docs/CONTRIBUTING.md
+++ b/docs/CONTRIBUTING.md
@@ -13,7 +13,7 @@ We welcome contribution to `stemflow`
 1. Submit a pull request
 
 
-We recommend you to open and issue of `feature` if you wish to add brand-new features before the PR, especially with heavy mathematics to resolve.
+We recommend you to open an issue of `feature` if you wish to add brand-new features before the PR, especially with heavy mathematics to resolve.
 
 ---
 
@@ -24,7 +24,7 @@ You will need your own fork to work on the code. Go to the `stemflow` project pa
 ```bash
 git clone git@github.com:YOUR-USER-NAME/stemflow.git stemflow-YOURNAME
 cd stemflow-YOURNAME
-git remote add upstream git://github.com/stemflow/stemflow.git
+git remote add upstream https://github.com/chenyangkang/stemflow.git
 ```
 
 This creates the directory `stemflow-YOURNAME` and connects your repository to the upstream (main project) `stemflow` repository.
@@ -45,9 +45,9 @@ To do this, first install miniconda or conda:
 Next, start a new environment called `stemflow`, activate it, and install dependencies:
 
 ```bash
-conda create -n stemflow -python=3.8 -y
+conda create -n stemflow python=3.9 -y
 activate stemflow
-conda install --file requirement.txt
+conda install --file requirements.txt
 conda install pre-commit pytest pytest-cov pytest-xdist
 
 pre-commit install
diff --git a/docs/index.md b/docs/index.md
index 6407eaf..6179cf8 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -166,13 +166,15 @@ model = AdaSTEMRegressor(
 Fitting and prediction methods follow the style of sklearn `BaseEstimator` class:
 
 ```py
+import numpy as np
+
 ## fit
 model = model.fit(X_train.reset_index(drop=True), y_train)
 
 ## predict
 pred = model.predict(X_test)
 pred = np.where(pred<0, 0, pred)
-eval_metrics = AdaSTEM.eval_STEM_res('hurdle',y_test, pred_mean)
+eval_metrics = AdaSTEM.eval_STEM_res('hurdle',y_test, pred)
 print(eval_metrics)
 ```
 
diff --git a/mkdocs.yml b/mkdocs.yml
index c67c37a..8298ec6 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -2,7 +2,7 @@ site_name: stemflow
 site_description: 'A package for Adaptive Spatio-Temporal Model (AdaSTEM) in python.'
 repo_name: 'chenyangkang/stemflow'
 repo_url: 'https://github.com/chenyangkang/stemflow'
-site_url: https://chenyangkag.github.io/stemflow/
+site_url: https://chenyangkang.github.io/stemflow/
 use_directory_urls: false
 
 theme:
@@ -104,8 +104,8 @@ nav:
       - 'Sphere_QTree': API_Documentation/gridding/stemflow.gridding.Sphere_QTree.md
       - 'QuadGrid': API_Documentation/gridding/stemflow.gridding.QuadGrid.md
     - stemflow.lazyloading:
-      - 'lazyloading': API_Documentation/gridding/stemflow.lazyloading.lazyloading.md
-      - 'open_db_connection': API_Documentation/gridding/stemflow.lazyloading.open_db_connection.md
+      - 'lazyloading': API_Documentation/lazyloading/stemflow.lazyloading.lazyloading.md
+      - 'open_db_connection': API_Documentation/lazyloading/stemflow.lazyloading.open_db_connection.md
     - stemflow.utils:
       - 'jitterrotation':
         - 'jitterrotator': API_Documentation/utils/jitterrotation/stemflow.utils.jitterrotation.jitterrotator.md
@@ -120,7 +120,6 @@ nav:
       - 'generate_random': API_Documentation/utils/stemflow.utils.generate_random.md
       - 'validation': API_Documentation/utils/stemflow.utils.validation.md
       - 'wrapper': API_Documentation/utils/stemflow.utils.wrapper.md
-      - 'lazyloading': API_Documentation/utils/stemflow.utils.lazyloading.md
     - stemflow.model_selection: API_Documentation/stemflow.model_selection.md
 
   - Fun Visualization: