diff --git a/Cargo.lock b/Cargo.lock
index ef409e72..857f4c42 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -102,7 +102,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "num 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -244,7 +244,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "hyper"
-version = "0.11.8"
+version = "0.11.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "base64 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -258,7 +258,7 @@ dependencies = [
  "percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "relay 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-core 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-core 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-io 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-proto 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-service 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -271,9 +271,9 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "futures 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
- "hyper 0.11.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hyper 0.11.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "native-tls 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-core 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-core 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-io 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-service 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-tls 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -560,7 +560,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "plato"
-version = "0.1.0"
+version = "0.2.1"
 dependencies = [
  "bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -575,8 +575,8 @@ dependencies = [
  "png 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "reqwest 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "titlecase 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-normalization 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -644,16 +644,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
- "hyper 0.11.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hyper 0.11.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper-tls 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libflate 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime_guess 2.0.0-alpha.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "native-tls 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_urlencoded 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-core 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-core 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-io 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-tls 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -720,22 +720,22 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.23"
+version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde_derive"
-version = "1.0.23"
+version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive_internals 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive_internals 0.18.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "serde_derive_internals"
-version = "0.17.0"
+version = "0.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -750,7 +750,7 @@ dependencies = [
  "dtoa 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "itoa 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -760,7 +760,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "dtoa 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "itoa 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -846,7 +846,7 @@ dependencies = [
 
 [[package]]
 name = "tokio-core"
-version = "0.1.10"
+version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -881,7 +881,7 @@ dependencies = [
  "slab 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "take 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-core 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-core 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-io 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-service 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -901,7 +901,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "futures 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "native-tls 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-core 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-core 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-io 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1039,7 +1039,7 @@ dependencies = [
 "checksum getopts 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)" = "65922871abd2f101a2eb0eaebadc66668e54a87ad9c3dd82520b5f86ede5eff9"
 "checksum html-entities 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b999f822bc9ae2a92fdb1f30b4989b2084d5848ac1d657b2f5e4c3ab1cc4b745"
 "checksum httparse 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "af2f2dd97457e8fb1ae7c5a420db346af389926e36f43768b96f101546b04a07"
-"checksum hyper 0.11.8 (registry+https://github.com/rust-lang/crates.io-index)" = "0d03ae910d2ac4c5ba6074a634003292a4dca70cbe602a6e1bddd47ac3dc87a1"
+"checksum hyper 0.11.9 (registry+https://github.com/rust-lang/crates.io-index)" = "e0594792d2109069d0caffd176f674d770a84adf024c5bb48e686b1ee5ac7659"
 "checksum hyper-tls 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9c81fa95203e2a6087242c38691a0210f23e9f3f8f944350bd676522132e2985"
 "checksum idna 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "014b298351066f1512874135335d62a789ffe78a9974f94b43ed5621951eaf7d"
 "checksum inflate 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "10ec05638adf7c5c788bc0cfa608cd479a13572beda20feb4898fe1d85d2c64b"
@@ -1090,9 +1090,9 @@ dependencies = [
 "checksum secur32-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3f412dfa83308d893101dd59c10d6fda8283465976c28c287c5c855bf8d216bc"
 "checksum security-framework 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)" = "dfa44ee9c54ce5eecc9de7d5acbad112ee58755239381f687e564004ba4a2332"
 "checksum security-framework-sys 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)" = "5421621e836278a0b139268f36eee0dc7e389b784dc3f79d8f11aabadf41bead"
-"checksum serde 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)" = "6a7c37d7f192f00041e8a613e936717923a71bc0c9051fc4425a49b104140f05"
-"checksum serde_derive 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)" = "0672de7300b02bac3f3689f8faea813c4a1ea9fe0cb49e80f714231d267518a2"
-"checksum serde_derive_internals 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)" = "32f1926285523b2db55df263d2aa4eb69ddcfa7a7eade6430323637866b513ab"
+"checksum serde 1.0.24 (registry+https://github.com/rust-lang/crates.io-index)" = "1c57ab4ec5fa85d08aaf8ed9245899d9bbdd66768945b21113b84d5f595cb6a1"
+"checksum serde_derive 1.0.24 (registry+https://github.com/rust-lang/crates.io-index)" = "02c92ea07b6e49b959c1481804ebc9bfd92d3c459f1274c9a9546829e42a66ce"
+"checksum serde_derive_internals 0.18.0 (registry+https://github.com/rust-lang/crates.io-index)" = "75c6aac7b99801a16db5b40b7bf0d7e4ba16e76fbf231e32a4677f271cac0603"
 "checksum serde_json 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "7cf5b0b5b4bd22eeecb7e01ac2e1225c7ef5e4272b79ee28a8392a8c8489c839"
 "checksum serde_urlencoded 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ce0fd303af908732989354c6f02e05e2e6d597152870f2c6990efb0577137480"
 "checksum siphasher 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "0df90a788073e8d0235a67e50441d47db7c8ad9debd91cbf43736a2a92d36537"
@@ -1106,7 +1106,7 @@ dependencies = [
 "checksum thread_local 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "279ef31c19ededf577bfd12dfae728040a21f635b06a24cd670ff510edd38963"
 "checksum time 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)" = "d5d788d3aa77bc0ef3e9621256885555368b47bd495c13dd2e7413c89f845520"
 "checksum titlecase 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0650399a761c61e9691ccc878bce2608291f7c18d8f84d188e6e11748a5316c8"
-"checksum tokio-core 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "c843a027f7c1df5f81e7734a0df3f67bf329411781ebf36393ce67beef6071e3"
+"checksum tokio-core 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)" = "c87c27560184212c9dc45cd8f38623f37918248aad5b58fb65303b5d07a98c6e"
 "checksum tokio-io 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "514aae203178929dbf03318ad7c683126672d4d96eccb77b29603d33c9e25743"
 "checksum tokio-proto 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8fbb47ae81353c63c487030659494b295f6cb6576242f907f203473b191b0389"
 "checksum tokio-service 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "24da22d077e0f15f55162bdbdc661228c1581892f52074fb242678d015b45162"
diff --git a/Cargo.toml b/Cargo.toml
index 16c60ddb..4726d8ec 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,38 +1,40 @@
 [package]
 authors = ["Bastien Dejean <nihilhill@gmail.com>"]
 name = "plato"
-version = "0.1.0"
+version = "0.2.1"
+
+[[bin]]
+name = "plato"
+path = "src/main.rs"
+
+[[bin]]
+name = "plato-import"
+path = "src/importer.rs"
 
 [dependencies]
 bitflags = "1.0.1"
 downcast-rs = "1.0.0"
 error-chain = "0.11.0"
 fnv = "1.0.6"
+getopts = "0.2.15"
+html-entities = "0.1.0"
 isbn = "0.1.0"
 lazy_static = "1.0.0"
 libc = "0.2.34"
 png = "0.11.0"
-getopts = "0.2.15"
-html-entities = "0.1.0"
-reqwest = "0.8.1"
 regex = "0.2.3"
-serde = "1.0.23"
-serde_derive = "1.0.23"
+serde = "1.0.24"
+serde_derive = "1.0.24"
 serde_json = "1.0.8"
 titlecase = "0.10.0"
 unicode-normalization = "0.1.5"
 
-[[bin]]
-name = "plato"
-path = "src/main.rs"
-
-[[bin]]
-name = "plato-import"
-path = "src/importer.rs"
+[dependencies.reqwest]
+version = "0.8.1"
+optional = true
 
 [dependencies.chrono]
 features = ["serde"]
 version = "0.4.0"
-
 [profile.release]
 panic = "abort"