diff --git a/core/http/request.go b/core/http/request.go
index 0fdde8a..9fd9ce7 100644
--- a/core/http/request.go
+++ b/core/http/request.go
@@ -83,13 +83,13 @@ func UnwrapWebAPIRequest(context context.Context, URL, token string) (string, er
 		return "", errors.New(resp.Message)
 	}
 	if !gjson.Valid(resp.Body) {
-		return "", fmt.Errorf("invalid json: %v", resp.Body)
+		return "", fmt.Errorf("Invalid JSON: %v", resp.Body)
 	}
 
 	err := gjson.Get(resp.Body, "error")
 
 	if !err.Exists() {
-		return "", errors.New("incompatible request body")
+		return "", errors.New("Incompatible request body")
 	}
 
 	if err.Bool() {
diff --git a/core/webapi/discovery.go b/core/webapi/discovery.go
index 8ce5c7b..12e16f8 100644
--- a/core/webapi/discovery.go
+++ b/core/webapi/discovery.go
@@ -23,7 +23,7 @@ func GetDiscoveryArtwork(c *fiber.Ctx, mode string) ([]ArtworkBrief, error) {
 	}
 	resp = session.ProxyImageUrl(c, resp)
 	if !gjson.Valid(resp) {
-		return nil, fmt.Errorf("invalid json: %v", resp)
+		return nil, fmt.Errorf("Invalid JSON: %v", resp)
 	}
 	data := gjson.Get(resp, "thumbnails.illust").String()
 
@@ -48,7 +48,7 @@ func GetDiscoveryNovels(c *fiber.Ctx, mode string) ([]NovelBrief, error) {
 	}
 	resp = session.ProxyImageUrl(c, resp)
 	if !gjson.Valid(resp) {
-		return nil, fmt.Errorf("invalid json: %v", resp)
+		return nil, fmt.Errorf("Invalid JSON: %v", resp)
 	}
 	data := gjson.Get(resp, "thumbnails.novel").String()
 
diff --git a/core/webapi/index.go b/core/webapi/index.go
index 3377e97..6240a0f 100644
--- a/core/webapi/index.go
+++ b/core/webapi/index.go
@@ -60,7 +60,7 @@ func GetLanding(c *fiber.Ctx, mode string) (*LandingArtworks, error) {
 	resp = session.ProxyImageUrl(c, resp)
 
 	if !gjson.Valid(resp) {
-		return nil, fmt.Errorf("invalid json: %v", resp)
+		return nil, fmt.Errorf("Invalid JSON: %v", resp)
 	}
 
 	artworks := map[string]ArtworkBrief{}
diff --git a/pages/actions.go b/pages/actions.go
index 25dbc14..decd75b 100644
--- a/pages/actions.go
+++ b/pages/actions.go
@@ -41,7 +41,7 @@ func pixivPostRequest(c *fiber.Ctx, url, payload, token, csrf string) error {
 	}
 	body_s := string(body)
 	if !gjson.Valid(body_s) {
-		return fmt.Errorf("invalid json: %v", body_s)
+		return fmt.Errorf("Invalid JSON: %v", body_s)
 	}
 	errr := gjson.Get(body_s, "error")
 
diff --git a/pages/artwork-multi.go b/pages/artwork-multi.go
index 643a01c..33c5ec4 100644
--- a/pages/artwork-multi.go
+++ b/pages/artwork-multi.go
@@ -1,7 +1,6 @@
 package pages
 
 import (
-	"errors"
 	"fmt"
 	"strconv"
 	"strings"
@@ -12,8 +11,8 @@ import (
 )
 
 func ArtworkMultiPage(c *fiber.Ctx) error {
-	param_ids := c.Params("ids")
-	ids := strings.Split(param_ids, ",")
+	ids_ := c.Params("ids")
+	ids := strings.Split(ids_, ",")
 
 	artworks := make([]*core.Illust, len(ids))
 
@@ -21,7 +20,7 @@ func ArtworkMultiPage(c *fiber.Ctx) error {
 	wg.Add(len(ids))
 	for i, id := range ids {
 		if _, err := strconv.Atoi(id); err != nil {
-			return errors.New("invalid id")
+			return fmt.Errorf("Invalid ID: %s", id)
 		}
 
 		go func(i int, id string) {
diff --git a/pages/artwork.go b/pages/artwork.go
index 679fc9d..5e8446d 100644
--- a/pages/artwork.go
+++ b/pages/artwork.go
@@ -1,7 +1,7 @@
 package pages
 
 import (
-	"errors"
+	"fmt"
 	"strconv"
 
 	core "codeberg.org/vnpower/pixivfe/v2/core/webapi"
@@ -9,12 +9,12 @@ import (
 )
 
 func ArtworkPage(c *fiber.Ctx) error {
-	param_id := c.Params("id")
-	if _, err := strconv.Atoi(param_id); err != nil {
-		return errors.New("invalid id")
+	id := c.Params("id")
+	if _, err := strconv.Atoi(id); err != nil {
+		return fmt.Errorf("Invalid ID: %s", id)
 	}
 
-	illust, err := core.GetArtworkByID(c, param_id, true)
+	illust, err := core.GetArtworkByID(c, id, true)
 	if err != nil {
 		return err
 	}
@@ -34,12 +34,12 @@ func ArtworkPage(c *fiber.Ctx) error {
 }
 
 func ArtworkEmbedPage(c *fiber.Ctx) error {
-	param_id := c.Params("id")
-	if _, err := strconv.Atoi(param_id); err != nil {
-		return errors.New("invalid id")
+	id := c.Params("id")
+	if _, err := strconv.Atoi(id); err != nil {
+		return fmt.Errorf("Invalid ID: %s", id)
 	}
 
-	illust, err := core.GetArtworkByID(c, param_id, false)
+	illust, err := core.GetArtworkByID(c, id, false)
 	if err != nil {
 		return err
 	}
diff --git a/pages/novel.go b/pages/novel.go
index e1390b2..2349059 100644
--- a/pages/novel.go
+++ b/pages/novel.go
@@ -1,7 +1,7 @@
 package pages
 
 import (
-	"errors"
+	"fmt"
 	"strconv"
 
 	core "codeberg.org/vnpower/pixivfe/v2/core/webapi"
@@ -9,12 +9,12 @@ import (
 )
 
 func NovelPage(c *fiber.Ctx) error {
-	param_id := c.Params("id")
-	if _, err := strconv.Atoi(param_id); err != nil {
-		return errors.New("invalid id")
+	id := c.Params("id")
+	if _, err := strconv.Atoi(id); err != nil {
+		return fmt.Errorf("Invalid ID: %s", id)
 	}
 
-	novel, err := core.GetNovelByID(c, param_id)
+	novel, err := core.GetNovelByID(c, id)
 	if err != nil {
 		return err
 	}
diff --git a/pages/settings.go b/pages/settings.go
index 6ef0c5f..b5cce24 100644
--- a/pages/settings.go
+++ b/pages/settings.go
@@ -116,7 +116,7 @@ func SettingsPost(c *fiber.Ctx) error {
 	case "reset-all":
 		err = resetAll(c)
 	default:
-		err = errors.New("no such setting available")
+		err = errors.New("No such setting is available.")
 	}
 
 	if err != nil {
diff --git a/staticcheck.conf b/staticcheck.conf
new file mode 100644
index 0000000..ebb3e0d
--- /dev/null
+++ b/staticcheck.conf
@@ -0,0 +1 @@
+checks = ["inherit", "-ST1005"] # no "error strings should not be capitalized"
\ No newline at end of file