diff --git a/.all-contributorsrc b/.all-contributorsrc
index 48e3cd55e9..b9154e1e6f 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -9,7 +9,7 @@
       "login": "kpango",
       "name": "Yusuke Kato",
       "avatar_url": "https://avatars1.githubusercontent.com/u/9798091?v=4",
-      "profile": "http://kpango.com",
+      "profile": "https://kpango.com",
       "contributions": [
         "code",
         "design",
@@ -111,7 +111,7 @@
       "login": "thedrow",
       "name": "Omer Katz",
       "avatar_url": "https://avatars.githubusercontent.com/u/48936?v=4",
-      "profile": "http://omerkatz.com",
+      "profile": "https://omerkatz.com",
       "contributions": [
         "doc",
         "tutorial"
diff --git a/Makefile.d/bench.mk b/Makefile.d/bench.mk
index e606206281..6979089ec4 100644
--- a/Makefile.d/bench.mk
+++ b/Makefile.d/bench.mk
@@ -15,7 +15,7 @@
 #
 $(BENCH_DATASETS): $(BENCH_DATASET_MD5S) $(BENCH_DATASET_HDF5_DIR)
 	@$(call green, "downloading datasets for benchmark...")
-	curl -fsSL -o $@ http://ann-benchmarks.com/$(patsubst $(BENCH_DATASET_HDF5_DIR)/%.hdf5,%.hdf5,$@)
+	curl -fsSL -o $@ https://ann-benchmarks.com/$(patsubst $(BENCH_DATASET_HDF5_DIR)/%.hdf5,%.hdf5,$@)
 	(cd $(BENCH_DATASET_BASE_DIR); \
 	    md5sum -c $(patsubst $(BENCH_DATASET_HDF5_DIR)/%.hdf5,$(BENCH_DATASET_MD5_DIR_NAME)/%.md5,$@) || \
 	    (rm -f $(patsubst $(BENCH_DATASET_HDF5_DIR)/%.hdf5,$(BENCH_DATASET_HDF5_DIR_NAME)/%.hdf5,$@) && exit 1))
diff --git a/README.md b/README.md
index 760ed20d6a..bc4970e1dd 100755
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ Vald is easy to use, feature-rich and highly customizable as you needed.
 
 It uses the fastest ANN Algorithm [NGT](https://github.com/yahoojapan/NGT) to search neighbors.
 
-(If you are interested in ANN benchmarks, please refer to [ann-benchmarks.com](http://ann-benchmarks.com/).)
+(If you are interested in ANN benchmarks, please refer to [ann-benchmarks.com](https://ann-benchmarks.com/).)
 
 For more information, please refer to [Official Web Site](https://vald.vdaas.org).
 
@@ -270,7 +270,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
 <table>
   <tbody>
     <tr>
-      <td align="center" valign="top" width="14.28%"><a href="http://kpango.com"><img src="https://avatars1.githubusercontent.com/u/9798091?v=4?s=100" width="100px;" alt="Yusuke Kato"/><br /><sub><b>Yusuke Kato</b></sub></a><br /><a href="https://github.com/vdaas/vald/commits?author=kpango" title="Code">💻</a> <a href="#design-kpango" title="Design">🎨</a> <a href="#maintenance-kpango" title="Maintenance">🚧</a> <a href="#projectManagement-kpango" title="Project Management">📆</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://kpango.com"><img src="https://avatars1.githubusercontent.com/u/9798091?v=4?s=100" width="100px;" alt="Yusuke Kato"/><br /><sub><b>Yusuke Kato</b></sub></a><br /><a href="https://github.com/vdaas/vald/commits?author=kpango" title="Code">💻</a> <a href="#design-kpango" title="Design">🎨</a> <a href="#maintenance-kpango" title="Maintenance">🚧</a> <a href="#projectManagement-kpango" title="Project Management">📆</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/rinx"><img src="https://avatars3.githubusercontent.com/u/1588935?v=4?s=100" width="100px;" alt="Rintaro Okamura"/><br /><sub><b>Rintaro Okamura</b></sub></a><br /><a href="https://github.com/vdaas/vald/commits?author=rinx" title="Code">💻</a> <a href="https://github.com/vdaas/vald/commits?author=rinx" title="Documentation">📖</a> <a href="#maintenance-rinx" title="Maintenance">🚧</a> <a href="#platform-rinx" title="Packaging/porting to new platform">📦</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://morimoto.dev/"><img src="https://avatars2.githubusercontent.com/u/413873?v=4?s=100" width="100px;" alt="Kosuke Morimoto"/><br /><sub><b>Kosuke Morimoto</b></sub></a><br /><a href="https://github.com/vdaas/vald/commits?author=kmrmt" title="Code">💻</a> <a href="#example-kmrmt" title="Examples">💡</a> <a href="#tool-kmrmt" title="Tools">🔧</a> <a href="https://github.com/vdaas/vald/commits?author=kmrmt" title="Tests">⚠️</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/vankichi"><img src="https://avatars3.githubusercontent.com/u/13959763?v=4?s=100" width="100px;" alt="Kiichiro YUKAWA"/><br /><sub><b>Kiichiro YUKAWA</b></sub></a><br /><a href="https://github.com/vdaas/vald/commits?author=vankichi" title="Documentation">📖</a> <a href="#maintenance-vankichi" title="Maintenance">🚧</a> <a href="https://github.com/vdaas/vald/commits?author=vankichi" title="Tests">⚠️</a> <a href="#tutorial-vankichi" title="Tutorials">✅</a></td>
@@ -281,7 +281,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/taisuou"><img src="https://avatars0.githubusercontent.com/u/21119375?v=4?s=100" width="100px;" alt="taisho"/><br /><sub><b>taisho</b></sub></a><br /><a href="#design-taisuou" title="Design">🎨</a> <a href="https://github.com/vdaas/vald/commits?author=taisuou" title="Documentation">📖</a> <a href="#example-taisuou" title="Examples">💡</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/pgrimaud"><img src="https://avatars1.githubusercontent.com/u/1866496?v=4?s=100" width="100px;" alt="Pierre Grimaud"/><br /><sub><b>Pierre Grimaud</b></sub></a><br /><a href="https://github.com/vdaas/vald/commits?author=pgrimaud" title="Documentation">📖</a></td>
-      <td align="center" valign="top" width="14.28%"><a href="http://omerkatz.com"><img src="https://avatars.githubusercontent.com/u/48936?v=4?s=100" width="100px;" alt="Omer Katz"/><br /><sub><b>Omer Katz</b></sub></a><br /><a href="https://github.com/vdaas/vald/commits?author=thedrow" title="Documentation">📖</a> <a href="#tutorial-thedrow" title="Tutorials">✅</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://omerkatz.com"><img src="https://avatars.githubusercontent.com/u/48936?v=4?s=100" width="100px;" alt="Omer Katz"/><br /><sub><b>Omer Katz</b></sub></a><br /><a href="https://github.com/vdaas/vald/commits?author=thedrow" title="Documentation">📖</a> <a href="#tutorial-thedrow" title="Tutorials">✅</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/zchee"><img src="https://avatars.githubusercontent.com/u/6366270?v=4?s=100" width="100px;" alt="Koichi Shiraishi"/><br /><sub><b>Koichi Shiraishi</b></sub></a><br /><a href="#a11y-zchee" title="Accessibility">️️️️♿️</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/liusy182"><img src="https://avatars.githubusercontent.com/u/3293332?v=4?s=100" width="100px;" alt="Siyuan Liu"/><br /><sub><b>Siyuan Liu</b></sub></a><br /><a href="#a11y-liusy182" title="Accessibility">️️️️♿️</a> <a href="#example-liusy182" title="Examples">💡</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/dotdc"><img src="https://avatars.githubusercontent.com/u/12827900?v=4?s=100" width="100px;" alt="David Calvert"/><br /><sub><b>David Calvert</b></sub></a><br /><a href="https://github.com/vdaas/vald/commits?author=dotdc" title="Documentation">📖</a></td>
diff --git a/charts/vald-helm-operator/values.schema.json b/charts/vald-helm-operator/values.schema.json
index b4a0383031..94119b542a 100644
--- a/charts/vald-helm-operator/values.schema.json
+++ b/charts/vald-helm-operator/values.schema.json
@@ -1,5 +1,5 @@
 {
-  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$schema": "https://json-schema.org/draft-07/schema#",
   "title": "Values",
   "type": "object",
   "properties": {
diff --git a/docs/tutorial/vald-agent-standalone-on-docker.md b/docs/tutorial/vald-agent-standalone-on-docker.md
index 81debbf370..e2dde5cbda 100644
--- a/docs/tutorial/vald-agent-standalone-on-docker.md
+++ b/docs/tutorial/vald-agent-standalone-on-docker.md
@@ -164,7 +164,7 @@ This chapter will use NGT for the core engine of Vald Agent.
 
    ```bash
    # download Fashion-MNIST testing dataset
-   wget http://ann-benchmarks.com/fashion-mnist-784-euclidean.hdf5
+   wget https://ann-benchmarks.com/fashion-mnist-784-euclidean.hdf5
    ```
 
 1. Running example
diff --git a/docs/tutorial/vald-agent-standalone-on-k8s.md b/docs/tutorial/vald-agent-standalone-on-k8s.md
index bdfcec848f..7ac4e73265 100644
--- a/docs/tutorial/vald-agent-standalone-on-k8s.md
+++ b/docs/tutorial/vald-agent-standalone-on-k8s.md
@@ -129,7 +129,7 @@ This chapter uses [NGT](https://github.com/yahoojapan/ngt) as Vald Agent to perf
 
     ```bash
     # download Fashion-MNIST testing dataset
-    wget http://ann-benchmarks.com/fashion-mnist-784-euclidean.hdf5
+    wget https://ann-benchmarks.com/fashion-mnist-784-euclidean.hdf5
     ```
 
 1.  Run Example
diff --git a/hack/helm/schema/gen/main.go b/hack/helm/schema/gen/main.go
index 571ef6ddc0..196736e3c5 100644
--- a/hack/helm/schema/gen/main.go
+++ b/hack/helm/schema/gen/main.go
@@ -275,7 +275,7 @@ func genNode(prefix []string, ls []*VSchema) (*Schema, error) {
 
 func newRoot(schemas map[string]*Schema) *Root {
 	return &Root{
-		SchemaKeyword: "http://json-schema.org/draft-07/schema#",
+		SchemaKeyword: "https://json-schema.org/draft-07/schema#",
 		Title:         "Values",
 		Schema: Schema{
 			Type:       objectType,