diff --git a/confluence/api.go b/confluence/api.go
index e6fb992..d549ba2 100644
--- a/confluence/api.go
+++ b/confluence/api.go
@@ -2,6 +2,7 @@ package confluence
 
 import (
 	"bytes"
+	"crypto/tls"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -97,7 +98,7 @@ func (tracer *tracer) Printf(format string, args ...interface{}) {
 	log.Tracef(nil, tracer.prefix+" "+format, args...)
 }
 
-func NewAPI(baseURL string, username string, password string) *API {
+func NewAPI(baseURL string, username string, password string, insecure bool) *API {
 	var auth *gopencils.BasicAuth
 	if username != "" {
 		auth = &gopencils.BasicAuth{
@@ -105,7 +106,19 @@ func NewAPI(baseURL string, username string, password string) *API {
 			Password: password,
 		}
 	}
-	rest := gopencils.Api(baseURL+"/rest/api", auth, 3) // set option for 3 retries on failure
+
+	var httpClient *http.Client
+	if insecure {
+		httpClient = &http.Client{
+			Transport: &http.Transport{
+				TLSClientConfig: &tls.Config{
+					InsecureSkipVerify: true,
+				},
+			},
+		}
+	}
+
+	rest := gopencils.Api(baseURL+"/rest/api", auth, httpClient, 3) // set option for 3 retries on failure
 	if username == "" {
 		if rest.Headers == nil {
 			rest.Headers = http.Header{}
@@ -113,7 +126,7 @@ func NewAPI(baseURL string, username string, password string) *API {
 		rest.SetHeader("Authorization", fmt.Sprintf("Bearer %s", password))
 	}
 
-	json := gopencils.Api(baseURL+"/rpc/json-rpc/confluenceservice-v2", auth, 3)
+	json := gopencils.Api(baseURL+"/rpc/json-rpc/confluenceservice-v2", auth, httpClient, 3)
 
 	if log.GetLevel() == lorg.LevelTrace {
 		rest.Logger = &tracer{"rest:"}
diff --git a/util/cli.go b/util/cli.go
index 9c56f6d..ef60617 100644
--- a/util/cli.go
+++ b/util/cli.go
@@ -49,7 +49,7 @@ func RunMark(ctx context.Context, cmd *cli.Command) error {
 		return err
 	}
 
-	api := confluence.NewAPI(creds.BaseURL, creds.Username, creds.Password)
+	api := confluence.NewAPI(creds.BaseURL, creds.Username, creds.Password, cmd.Bool("insecure"))
 
 	files, err := doublestar.FilepathGlob(cmd.String("files"))
 	if err != nil {
diff --git a/util/flags.go b/util/flags.go
index e4807df..fb4bbdd 100644
--- a/util/flags.go
+++ b/util/flags.go
@@ -196,6 +196,12 @@ var Flags = []cli.Flag{
 		Usage:   "Enables optional features. Current features: d2, mermaid, mkdocsadmonitions",
 		Sources: cli.NewValueSourceChain(cli.EnvVar("MARK_FEATURES"), altsrctoml.TOML("features", altsrc.NewStringPtrSourcer(&filename))),
 	},
+	&cli.BoolFlag{
+		Name:    "insecure",
+		Value:   false,
+		Usage:   "skip TLS certificate verification (useful for self-signed certificates)",
+		Sources: cli.NewValueSourceChain(cli.EnvVar("MARK_INSECURE"), altsrctoml.TOML("insecure", altsrc.NewStringPtrSourcer(&filename))),
+	},
 }
 
 // CheckMutuallyExclusiveTitleFlags checks if both title-from-h1 and title-from-filename are set