diff --git a/Cargo.lock b/Cargo.lock
index 18a9faa..1f41d9a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.18"
@@ -105,9 +107,9 @@ checksum = "524cbf6897b527295dff137cec09ecf3a05f4fddffd7dfcd1585403449e74198"
 
 [[package]]
 name = "env_logger"
-version = "0.8.3"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "17392a012ea30ef05a610aa97dfb49496e71c9f676b27879922ea5bdf60d9d3f"
+checksum = "0b2cf0344971ee6c64c31be0d530793fba457d322dfec2810c453d0ef228f9c3"
 dependencies = [
  "atty",
  "humantime",
@@ -133,16 +135,15 @@ checksum = "75224bec9bfe1a65e2d34132933f2de7fe79900c96a0174307554244ece8150e"
 
 [[package]]
 name = "g-code"
-version = "0.1.2"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "412578b8fb51367bb010118f00d4c835fa74a0ab993525ecd487fa93084a6450"
+checksum = "c9346657aa1dcd14afe88387e293cdef29532b76b4539abda7e94d42e39f3a18"
 dependencies = [
  "codespan",
  "codespan-reporting",
- "num",
- "num-rational",
  "paste",
  "peg",
+ "rust_decimal",
 ]
 
 [[package]]
@@ -156,9 +157,9 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.18"
+version = "0.1.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "322f4de77956e22ed0e5032c359a0f1273f1f7f0d79bfa3b8ffbc730d7fbcc5c"
+checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
 dependencies = [
  "libc",
 ]
@@ -177,9 +178,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.96"
+version = "0.2.98"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5600b4e6efc5421841a2138a6b082e07fe12f9aaa12783d50e5d13325b26b4fc"
+checksum = "320cfe77175da3a483efed4bc0adc1968ca050b098ce4f2f1c13a56626128790"
 
 [[package]]
 name = "log"
@@ -192,9 +193,9 @@ dependencies = [
 
 [[package]]
 name = "lyon_geom"
-version = "0.17.2"
+version = "0.17.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b63e4ad431a0d079d443e2f195d37ae062743886c73b83c1fd313bf1deec649"
+checksum = "f1e79ed83352715656b6e73bd9c1b54736f22d0c6ad9b1809ad20d585b943f4a"
 dependencies = [
  "arrayvec",
  "euclid",
@@ -207,60 +208,6 @@ version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b16bd47d9e329435e309c58469fe0791c2d0d1ba96ec0954152a5ae2b04387dc"
 
-[[package]]
-name = "num"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43db66d1170d347f9a065114077f7dccb00c1b9478c89384490a3425279a4606"
-dependencies = [
- "num-complex",
- "num-integer",
- "num-iter",
- "num-rational",
- "num-traits",
-]
-
-[[package]]
-name = "num-complex"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26873667bbbb7c5182d4a37c1add32cdf09f841af72da53318fdb81543c15085"
-dependencies = [
- "num-traits",
-]
-
-[[package]]
-name = "num-integer"
-version = "0.1.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2cc698a63b549a70bc047073d2949cce27cd1c7b0a4a862d08a8031bc2801db"
-dependencies = [
- "autocfg",
- "num-traits",
-]
-
-[[package]]
-name = "num-iter"
-version = "0.1.42"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2021c8337a54d21aca0d59a92577a029af9431cb59b909b03252b9c164fad59"
-dependencies = [
- "autocfg",
- "num-integer",
- "num-traits",
-]
-
-[[package]]
-name = "num-rational"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d41702bd167c2df5520b384281bc111a4b5efcf7fbc4c9c222c815b07e0a6a6a"
-dependencies = [
- "autocfg",
- "num-integer",
- "num-traits",
-]
-
 [[package]]
 name = "num-traits"
 version = "0.2.14"
@@ -350,9 +297,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.27"
+version = "1.0.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0d8caf72986c1a598726adc988bb5984792ef84f5ee5aa50209145ee8077038"
+checksum = "5c7ed8b8c7b886ea3ed7dde405212185f423ab44682667c8c6dd14aa1d9f6612"
 dependencies = [
  "unicode-xid",
 ]
@@ -392,6 +339,16 @@ dependencies = [
  "xmlparser",
 ]
 
+[[package]]
+name = "rust_decimal"
+version = "1.14.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "01127cb8617e5e21bcf2e19b5eb48317735ca677f1d0a94833c21c331c446582"
+dependencies = [
+ "arrayvec",
+ "num-traits",
+]
+
 [[package]]
 name = "siphasher"
 version = "0.2.3"
@@ -406,9 +363,9 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
 [[package]]
 name = "structopt"
-version = "0.3.21"
+version = "0.3.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5277acd7ee46e63e5168a80734c9f6ee81b1367a7d8772a2d765df2a3705d28c"
+checksum = "69b041cdcb67226aca307e6e7be44c8806423d83e018bd662360a93dabce4d71"
 dependencies = [
  "clap",
  "lazy_static",
@@ -417,9 +374,9 @@ dependencies = [
 
 [[package]]
 name = "structopt-derive"
-version = "0.4.14"
+version = "0.4.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ba9cdfda491b814720b6b06e0cac513d922fc407582032e8706e9f137976f90"
+checksum = "7813934aecf5f51a54775e00068c237de98489463968231a51746bbbc03f9c10"
 dependencies = [
  "heck",
  "proc-macro-error",
@@ -458,9 +415,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.73"
+version = "1.0.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f71489ff30030d2ae598524f61326b902466f72a0fb1a8564c001cc63425bcc7"
+checksum = "1873d832550d4588c3dbc20f01361ab00bfe741048f71e3fecf145a7cc18b29c"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -493,9 +450,9 @@ checksum = "879f6906492a7cd215bfa4cf595b600146ccfac0c79bcbd1f3000162af5e8b06"
 
 [[package]]
 name = "unicode-segmentation"
-version = "1.7.1"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb0d2e7be6ae3a5fa87eed5fb451aff96f2573d2694942e40543ae0bbe19c796"
+checksum = "8895849a949e7845e06bd6dc1aa51731a103c42707010a5b591c0038fb73385b"
 
 [[package]]
 name = "unicode-width"
diff --git a/Cargo.toml b/Cargo.toml
index e5225a3..9d5d694 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 description = "Convert paths in SVG files to GCode for a pen plotter, laser engraver, or other machine."
 
 [dependencies]
-g-code = "0.1.2"
+g-code = "0.2"
 lyon_geom = ">= 0.17.2"
 euclid = "0.22"
 structopt = "0.3"
diff --git a/src/turtle.rs b/src/turtle.rs
index f15847c..d054061 100644
--- a/src/turtle.rs
+++ b/src/turtle.rs
@@ -91,13 +91,13 @@ impl<'input> Turtle<'input> {
             linear_interpolation.push(Field {
                 letters: Cow::Borrowed("Z"),
                 value: Value::Float(z),
-            });
+            }).unwrap();
         }
         if let Some(f) = f {
             linear_interpolation.push(Field {
                 letters: Cow::Borrowed("F"),
                 value: Value::Float(f),
-            });
+            }).unwrap();
         }
         linear_interpolation.into_token_vec()
     }