diff --git a/Cargo.toml b/Cargo.toml
index 8f6dcc2..a3067d0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@ keywords = ["C", "expression", "parser"]
 license = "Apache-2.0/MIT"
 repository = "https://github.com/jethrogb/rust-cexpr"
 [dependencies.nom]
-version = "6"
+version = "7"
 features = ["std"]
 default-features = false
 [dev-dependencies.clang-sys]
diff --git a/src/expr.rs b/src/expr.rs
index 5dce3c7..7f7e458 100644
--- a/src/expr.rs
+++ b/src/expr.rs
@@ -308,7 +308,7 @@ impl<'a> PRef<'a> {
             pair(complete(one_of_punctuation(&["*", "/", "%"][..])), |i| {
                 self.unary(i)
             }),
-            acc,
+            move || acc.clone(),
             |mut acc, (op, val): (&[u8], EvalResult)| {
                 match op[0] as char {
                     '*' => acc *= &val,
@@ -327,7 +327,7 @@ impl<'a> PRef<'a> {
             pair(complete(one_of_punctuation(&["+", "-"][..])), |i| {
                 self.mul_div_rem(i)
             }),
-            acc,
+            move || acc.clone(),
             |mut acc, (op, val): (&[u8], EvalResult)| {
                 match op[0] as char {
                     '+' => acc += &val,
@@ -345,7 +345,7 @@ impl<'a> PRef<'a> {
             pair(complete(one_of_punctuation(&["<<", ">>"][..])), |i| {
                 self.add_sub(i)
             }),
-            acc,
+            move || acc.clone(),
             |mut acc, (op, val): (&[u8], EvalResult)| {
                 match op {
                     b"<<" => acc <<= &val,
@@ -361,7 +361,7 @@ impl<'a> PRef<'a> {
         let (input, acc) = self.shl_shr(input)?;
         numeric(fold_many0(
             preceded(complete(p("&")), |i| self.shl_shr(i)),
-            acc,
+            move || acc.clone(),
             |mut acc, val: EvalResult| {
                 acc &= &val;
                 acc
@@ -373,7 +373,7 @@ impl<'a> PRef<'a> {
         let (input, acc) = self.and(input)?;
         numeric(fold_many0(
             preceded(complete(p("^")), |i| self.and(i)),
-            acc,
+            move || acc.clone(),
             |mut acc, val: EvalResult| {
                 acc ^= &val;
                 acc
@@ -385,7 +385,7 @@ impl<'a> PRef<'a> {
         let (input, acc) = self.xor(input)?;
         numeric(fold_many0(
             preceded(complete(p("|")), |i| self.xor(i)),
-            acc,
+            move || acc.clone(),
             |mut acc, val: EvalResult| {
                 acc |= &val;
                 acc
diff --git a/src/literal.rs b/src/literal.rs
index b74699f..68e85c7 100644
--- a/src/literal.rs
+++ b/src/literal.rs
@@ -224,7 +224,7 @@ fn c_string(i: &[u8]) -> nom::IResult<&[u8], Vec<u8>> {
                 map(escaped_char, |c: CChar| c.into()),
                 map(is_not([b'\\', b'"']), |c: &[u8]| c.into()),
             )),
-            Vec::new(),
+            Vec::new,
             |mut v: Vec<u8>, res: Vec<u8>| {
                 v.extend_from_slice(&res);
                 v