diff --git a/rust/src/applayertemplate/parser.rs b/rust/src/applayertemplate/parser.rs
index dc096eb0c6..52d90cded7 100644
--- a/rust/src/applayertemplate/parser.rs
+++ b/rust/src/applayertemplate/parser.rs
@@ -15,10 +15,10 @@
  * 02110-1301, USA.
  */
 
-use nom7::{
+use nom8::{
     bytes::streaming::{take, take_until},
     combinator::map_res,
-    IResult,
+    IResult, Parser,
 };
 use std;
 
@@ -27,9 +27,9 @@ fn parse_len(input: &str) -> Result<u32, std::num::ParseIntError> {
 }
 
 pub fn parse_message(i: &[u8]) -> IResult<&[u8], String> {
-    let (i, len) = map_res(map_res(take_until(":"), std::str::from_utf8), parse_len)(i)?;
-    let (i, _sep) = take(1_usize)(i)?;
-    let (i, msg) = map_res(take(len as usize), std::str::from_utf8)(i)?;
+    let (i, len) = map_res(map_res(take_until(":"), std::str::from_utf8), parse_len).parse(i)?;
+    let (i, _sep) = take(1_usize).parse(i)?;
+    let (i, msg) = map_res(take(len as usize), std::str::from_utf8).parse(i)?;
     let result = msg.to_string();
     Ok((i, result))
 }
@@ -37,7 +37,7 @@ pub fn parse_message(i: &[u8]) -> IResult<&[u8], String> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use nom7::Err;
+    use nom8::Err;
 
     /// Simple test of some valid data.
     #[test]
diff --git a/rust/src/applayertemplate/template.rs b/rust/src/applayertemplate/template.rs
index 022343306a..fc59e723ae 100644
--- a/rust/src/applayertemplate/template.rs
+++ b/rust/src/applayertemplate/template.rs
@@ -20,7 +20,8 @@ use crate::applayer::*;
 use crate::conf::conf_get;
 use crate::core::{ALPROTO_UNKNOWN, IPPROTO_TCP};
 use crate::flow::Flow;
-use nom7 as nom;
+use nom8 as nom;
+use nom8::{AsChar, Parser};
 use std;
 use std::collections::VecDeque;
 use std::ffi::CString;
@@ -247,11 +248,11 @@ impl TemplateState {
 /// characters for that pattern.
 fn probe(input: &[u8]) -> nom::IResult<&[u8], ()> {
     let size = std::cmp::min(10, input.len());
-    let (rem, prefix) = nom::bytes::complete::take(size)(input)?;
+    let (rem, prefix) = nom::bytes::complete::take(size).parse(input)?;
     nom::sequence::terminated(
-        nom::bytes::complete::take_while1(nom::character::is_digit),
+        nom::bytes::complete::take_while1(|c: u8| c.is_dec_digit()),
         nom::bytes::complete::tag(":"),
-    )(prefix)?;
+    ).parse(prefix)?;
     Ok((rem, ()))
 }