diff --git a/database.go b/database.go
index e61ef43..64d0fff 100644
--- a/database.go
+++ b/database.go
@@ -6,6 +6,7 @@ import (
 	"errors"
 	"log"
 	"os"
+	"strings"
 	"sync"
 
 	"github.com/gchaincl/sqlhooks/v2"
@@ -63,25 +64,18 @@ func (a *goBlog) openDatabase(file string, logging bool) (*database, error) {
 	var dr driver.Driver = &sqlite.SQLiteDriver{
 		ConnectHook: func(c *sqlite.SQLiteConn) error {
 			// Register functions
-			// Depends on app
-			if err := c.RegisterFunc("mdtext", a.renderText, true); err != nil {
-				return err
-			}
-			// Independent
-			if err := c.RegisterFunc("tolocal", toLocalSafe, true); err != nil {
-				return err
-			}
-			if err := c.RegisterFunc("toutc", toUTCSafe, true); err != nil {
-				return err
-			}
-			if err := c.RegisterFunc("wordcount", wordCount, true); err != nil {
-				return err
-			}
-			if err := c.RegisterFunc("charcount", charCount, true); err != nil {
-				return err
-			}
-			if err := c.RegisterFunc("urlize", urlize, true); err != nil {
-				return err
+			for n, f := range map[string]interface{}{
+				"mdtext":    a.renderText,
+				"tolocal":   toLocalSafe,
+				"toutc":     toUTCSafe,
+				"wordcount": wordCount,
+				"charcount": charCount,
+				"urlize":    urlize,
+				"lowerx":    strings.ToLower,
+			} {
+				if err := c.RegisterFunc(n, f, true); err != nil {
+					return err
+				}
 			}
 			return nil
 		},
diff --git a/postsDb.go b/postsDb.go
index 5afd5a1..6fd4638 100644
--- a/postsDb.go
+++ b/postsDb.go
@@ -288,7 +288,7 @@ func buildPostsQuery(c *postsRequestConfig, selection string) (query string, arg
 		}
 	}
 	if c.taxonomy != nil && len(c.taxonomyValue) > 0 {
-		queryBuilder.WriteString(" and path in (select path from post_parameters where parameter = @taxname and lower(value) = lower(@taxval))")
+		queryBuilder.WriteString(" and path in (select path from post_parameters where parameter = @taxname and lowerx(value) = lowerx(@taxval))")
 		args = append(args, sql.Named("taxname", c.taxonomy.Name), sql.Named("taxval", c.taxonomyValue))
 	}
 	if len(c.sections) > 0 {
diff --git a/webmention.go b/webmention.go
index 1a886fe..80fd49e 100644
--- a/webmention.go
+++ b/webmention.go
@@ -89,7 +89,7 @@ func (a *goBlog) extractMention(r *http.Request) (*mention, error) {
 
 func (db *database) webmentionExists(source, target string) bool {
 	result := 0
-	row, err := db.queryRow("select exists(select 1 from webmentions where lower(source) = lower(@source) and lower(target) = lower(@target))", sql.Named("source", source), sql.Named("target", target))
+	row, err := db.queryRow("select exists(select 1 from webmentions where lowerx(source) = lowerx(@source) and lowerx(target) = lowerx(@target))", sql.Named("source", source), sql.Named("target", target))
 	if err != nil {
 		return false
 	}
@@ -107,6 +107,23 @@ func (a *goBlog) createWebmention(source, target string) (err error) {
 	})
 }
 
+func (db *database) insertWebmention(m *mention, status webmentionStatus) error {
+	_, err := db.exec(
+		`
+		insert into webmentions (source, target, created, status, title, content, author) 
+		values (@source, @target, @created, @status, @title, @content, @author)
+		`,
+		sql.Named("source", m.Source),
+		sql.Named("target", m.Target),
+		sql.Named("created", m.Created),
+		sql.Named("status", status),
+		sql.Named("title", m.Title),
+		sql.Named("content", m.Content),
+		sql.Named("author", m.Author),
+	)
+	return err
+}
+
 func (db *database) deleteWebmention(id int) error {
 	_, err := db.exec("delete from webmentions where id = @id", sql.Named("id", id))
 	return err
@@ -146,7 +163,7 @@ func buildWebmentionsQuery(config *webmentionsRequestConfig) (query string, args
 	if config != nil {
 		queryBuilder.WriteString("where 1")
 		if config.target != "" {
-			queryBuilder.WriteString(" and lower(target) = lower(@target)")
+			queryBuilder.WriteString(" and lowerx(target) = lowerx(@target)")
 			args = append(args, sql.Named("target", config.target))
 		}
 		if config.status != "" {
@@ -154,8 +171,8 @@ func buildWebmentionsQuery(config *webmentionsRequestConfig) (query string, args
 			args = append(args, sql.Named("status", config.status))
 		}
 		if config.sourcelike != "" {
-			queryBuilder.WriteString(" and lower(source) like @sourcelike")
-			args = append(args, sql.Named("sourcelike", "%"+strings.ToLower(config.sourcelike)+"%"))
+			queryBuilder.WriteString(" and lowerx(source) like ('%' || lowerx(@sourcelike) || '%')")
+			args = append(args, sql.Named("sourcelike", config.sourcelike))
 		}
 		if config.id != 0 {
 			queryBuilder.WriteString(" and id = @id")
diff --git a/webmentionVerification.go b/webmentionVerification.go
index 495c2dd..acd35d8 100644
--- a/webmentionVerification.go
+++ b/webmentionVerification.go
@@ -110,11 +110,10 @@ func (a *goBlog) verifyMention(m *mention) error {
 	}
 	newStatus := webmentionStatusVerified
 	if a.db.webmentionExists(m.Source, m.Target) {
-		_, err = a.db.exec("update webmentions set status = @status, title = @title, content = @content, author = @author where lower(source) = lower(@source) and lower(target) = lower(@target)",
+		_, err = a.db.exec("update webmentions set status = @status, title = @title, content = @content, author = @author where lowerx(source) = lowerx(@source) and lowerx(target) = lowerx(@target)",
 			sql.Named("status", newStatus), sql.Named("title", m.Title), sql.Named("content", m.Content), sql.Named("author", m.Author), sql.Named("source", m.Source), sql.Named("target", m.Target))
 	} else {
-		_, err = a.db.exec("insert into webmentions (source, target, created, status, title, content, author) values (@source, @target, @created, @status, @title, @content, @author)",
-			sql.Named("source", m.Source), sql.Named("target", m.Target), sql.Named("created", m.Created), sql.Named("status", newStatus), sql.Named("title", m.Title), sql.Named("content", m.Content), sql.Named("author", m.Author))
+		a.db.insertWebmention(m, newStatus)
 		a.sendNotification(fmt.Sprintf("New webmention from %s to %s", m.Source, m.Target))
 	}
 	return err
diff --git a/webmention_test.go b/webmention_test.go
new file mode 100644
index 0000000..19c12ff
--- /dev/null
+++ b/webmention_test.go
@@ -0,0 +1,74 @@
+package main
+
+import (
+	"path/filepath"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func Test_webmentions(t *testing.T) {
+	app := &goBlog{
+		cfg: &config{
+			Db: &configDb{
+				File: filepath.Join(t.TempDir(), "test.db"),
+			},
+			Server: &configServer{
+				PublicAddress: "https://example.com",
+			},
+			Blogs: map[string]*configBlog{
+				"en": {
+					Lang: "en",
+				},
+			},
+			DefaultBlog: "en",
+			User:        &configUser{},
+		},
+	}
+
+	_ = app.initDatabase(false)
+	app.initComponents()
+
+	app.db.insertWebmention(&mention{
+		Source:  "https://example.net/test",
+		Target:  "https://example.com/täst",
+		Created: time.Now().Unix(),
+		Title:   "Test-Title",
+		Content: "Test-Content",
+		Author:  "Test-Author",
+	}, webmentionStatusVerified)
+
+	mentions, err := app.db.getWebmentions(&webmentionsRequestConfig{
+		sourcelike: "example.xyz",
+	})
+	require.NoError(t, err)
+	assert.Len(t, mentions, 0)
+
+	count, err := app.db.countWebmentions(&webmentionsRequestConfig{
+		sourcelike: "example.net",
+	})
+	require.NoError(t, err)
+	assert.Equal(t, 1, count)
+
+	exists := app.db.webmentionExists("Https://Example.net/test", "Https://Example.com/TÄst")
+	assert.True(t, exists)
+
+	mentions = app.db.getWebmentionsByAddress("https://example.com/täst")
+	assert.Len(t, mentions, 0)
+
+	mentions, err = app.db.getWebmentions(&webmentionsRequestConfig{
+		sourcelike: "example.net",
+	})
+	require.NoError(t, err)
+	if assert.Len(t, mentions, 1) {
+
+		app.db.approveWebmention(mentions[0].ID)
+
+	}
+
+	mentions = app.db.getWebmentionsByAddress("https://example.com/täst")
+	assert.Len(t, mentions, 1)
+
+}