diff --git a/CHANGELOG.md b/CHANGELOG.md
index bff3b748..89400e17 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,11 +1,17 @@
 Rhai Release Notes
 ==================
 
-Version 0.19.16
-===============
+Version 0.20.1
+==============
+
+
+Version 0.20.0
+==============
 
 This version adds string interpolation with `` `... ${`` ... ``} ...` `` syntax.
 
+`switch` statement cases can now have conditions.
+
 Negative indices for arrays and strings are allowed and now count from the end (-1 = last item/character).
 
 Bug fixes
diff --git a/Cargo.toml b/Cargo.toml
index 90100ff3..c9f5166b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ members = [".", "codegen"]
 
 [package]
 name = "rhai"
-version = "0.19.16"
+version = "0.20.1"
 edition = "2018"
 authors = ["Jonathan Turner", "Lukáš Hozda", "Stephen Chung", "jhwgh1968"]
 description = "Embedded scripting for Rust"
diff --git a/codegen/Cargo.toml b/codegen/Cargo.toml
index e24f866c..d02e4388 100644
--- a/codegen/Cargo.toml
+++ b/codegen/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rhai_codegen"
-version = "0.3.4"
+version = "0.3.5"
 edition = "2018"
 authors = ["jhwgh1968"]
 description = "Procedural macro support package for Rhai, a scripting language for Rust"
@@ -16,7 +16,7 @@ default = []
 metadata = []
 
 [dev-dependencies]
-rhai = { path = "..", version = "0.19" }
+rhai = { path = "..", version = ">=0.19.15" }
 trybuild = "1"
 
 [dependencies]
diff --git a/src/parser.rs b/src/parser.rs
index d376d7f2..6169657c 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -1328,7 +1328,7 @@ fn parse_unary(
 
             match parse_unary(input, state, lib, settings.level_up())? {
                 // Negative integer
-                Expr::IntegerConstant(num, pos) => num
+                Expr::IntegerConstant(num, _) => num
                     .checked_neg()
                     .map(|i| Expr::IntegerConstant(i, pos))
                     .or_else(|| {
@@ -1341,7 +1341,7 @@ fn parse_unary(
 
                 // Negative float
                 #[cfg(not(feature = "no_float"))]
-                Expr::FloatConstant(x, pos) => Ok(Expr::FloatConstant((-(*x)).into(), pos)),
+                Expr::FloatConstant(x, _) => Ok(Expr::FloatConstant((-(*x)).into(), pos)),
 
                 // Call negative function
                 expr => {
diff --git a/src/token.rs b/src/token.rs
index d12831ca..a035d278 100644
--- a/src/token.rs
+++ b/src/token.rs
@@ -1240,7 +1240,7 @@ fn get_next_token_inner(
         );
     }
 
-    let mut negated = false;
+    let mut negated_pos = Position::NONE;
 
     while let Some(c) = stream.get_next() {
         pos.advance();
@@ -1349,9 +1349,12 @@ fn get_next_token_inner(
                     }
                 }
 
-                if negated {
+                let num_pos = if !negated_pos.is_none() {
                     result.insert(0, '-');
-                }
+                    negated_pos
+                } else {
+                    start_pos
+                };
 
                 // Parse number
                 return Some((
@@ -1388,7 +1391,7 @@ fn get_next_token_inner(
                             Token::LexError(LERR::MalformedNumber(result.into_iter().collect()))
                         })
                     },
-                    start_pos,
+                    num_pos,
                 ));
             }
 
@@ -1507,7 +1510,7 @@ fn get_next_token_inner(
             ('+', _) if !state.non_unary => return Some((Token::UnaryPlus, start_pos)),
             ('+', _) => return Some((Token::Plus, start_pos)),
 
-            ('-', '0'..='9') if !state.non_unary => negated = true,
+            ('-', '0'..='9') if !state.non_unary => negated_pos = start_pos,
             ('-', '0'..='9') => return Some((Token::Minus, start_pos)),
             ('-', '=') => {
                 eat_next(stream, pos);