diff --git a/Cargo.lock b/Cargo.lock
index b895aad..1cd7180 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -63,12 +63,12 @@ dependencies = [
 ]
 
 [[package]]
-name = "ber"
+name = "bcder"
 version = "0.1.0"
-source = "git+https://github.com/NLnetLabs/ber-rs.git#99800b2f0bd9cb45efa4d890cbf10749d4192c51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -173,22 +173,22 @@ dependencies = [
 
 [[package]]
 name = "failure"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "backtrace 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure_derive 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure_derive 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "failure_derive"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.14.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "synstructure 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "synstructure 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -527,7 +527,7 @@ dependencies = [
  "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.5.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures-cpupool 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "json 0.11.13 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -535,6 +535,7 @@ dependencies = [
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rpki 0.1.0 (git+https://github.com/NLnetLabs/rpki-rs.git)",
+ "slab 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-process 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -542,13 +543,13 @@ dependencies = [
 [[package]]
 name = "rpki"
 version = "0.1.0"
-source = "git+https://github.com/NLnetLabs/rpki-rs.git#244189e081b5dfdd8d42ef2ce6ea3d8cd25c51a1"
+source = "git+https://github.com/NLnetLabs/rpki-rs.git#8549ba14491d3bcaeb416653e9c6b21d81eab828"
 dependencies = [
  "base64 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "ber 0.1.0 (git+https://github.com/NLnetLabs/ber-rs.git)",
+ "bcder 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bytes 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "ring 0.13.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -628,7 +629,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "syn"
-version = "0.14.9"
+version = "0.15.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -638,12 +639,12 @@ dependencies = [
 
 [[package]]
 name = "synstructure"
-version = "0.9.0"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.14.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -990,7 +991,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum backtrace 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "89a47830402e9981c5c41223151efcced65a0510c13097c769cede7efb34782a"
 "checksum backtrace-sys 0.1.24 (registry+https://github.com/rust-lang/crates.io-index)" = "c66d56ac8dabd07f6aacdaf633f4b8262f5b3601a810a0dcddffd5c22c69daa0"
 "checksum base64 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)" = "489d6c0ed21b11d038c31b6ceccca973e65d73ba3bd8ecb9a2babf5546164643"
-"checksum ber 0.1.0 (git+https://github.com/NLnetLabs/ber-rs.git)" = "<none>"
+"checksum bcder 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5f3c9ea672decc964b19eab3be7cf23c8c3869ec122b53d49f50d0622f104d57"
 "checksum bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"
 "checksum byteorder 1.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "90492c5858dd7d2e78691cfb89f90d273a2800fc11d98f60786e5d87e2f83781"
 "checksum bytes 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "0ce55bd354b095246fc34caf4e9e242f5297a7fd938b090cadfea6eee614aa62"
@@ -1003,8 +1004,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum crossbeam-epoch 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "30fecfcac6abfef8771151f8be4abc9e4edc112c2bcb233314cafde2680536e9"
 "checksum crossbeam-utils 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "677d453a17e8bd2b913fa38e8b9cf04bcdbb5be790aa294f2389661d72036015"
 "checksum env_logger 0.5.13 (registry+https://github.com/rust-lang/crates.io-index)" = "15b0a4d2e39f8420210be8b27eeda28029729e2fd4291019455016c348240c38"
-"checksum failure 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7efb22686e4a466b1ec1a15c2898f91fa9cb340452496dca654032de20ff95b9"
-"checksum failure_derive 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "946d0e98a50d9831f5d589038d2ca7f8f455b1c21028c0db0e84116a12696426"
+"checksum failure 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6dd377bcc1b1b7ce911967e3ec24fa19c3224394ec05b54aa7b083d498341ac7"
+"checksum failure_derive 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "64c2d913fe8ed3b6c6518eedf4538255b989945c14c2a7d5cbff62a5e2120596"
 "checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
 "checksum fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
 "checksum futures 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)" = "49e7653e374fe0d0c12de4250f0bdb60680b8c80eed558c5c7538eec9c89e21b"
@@ -1057,8 +1058,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum socket2 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "c4d11a52082057d87cb5caa31ad812f4504b97ab44732cd8359df2e9ff9f48e7"
 "checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
 "checksum strsim 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bb4f380125926a99e52bc279241539c018323fab05ad6368b56f93d9369ff550"
-"checksum syn 0.14.9 (registry+https://github.com/rust-lang/crates.io-index)" = "261ae9ecaa397c42b960649561949d69311f08eeaea86a65696e6e46517cf741"
-"checksum synstructure 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "85bb9b7550d063ea184027c9b8c20ac167cd36d3e06b3a40bceb9d746dc1a7b7"
+"checksum syn 0.15.13 (registry+https://github.com/rust-lang/crates.io-index)" = "7b4439ee8325b4e4b57e59309c3724c9a4478eaeb4eb094b6f3fac180a3b2876"
+"checksum synstructure 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ec37f4fab4bafaf6b5621c1d54e6aa5d4d059a8f84929e87abfdd7f9f04c6db2"
 "checksum termcolor 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4096add70612622289f2fdcdbd5086dc81c1e2675e6ae58d6c4f62a16c6d7f2f"
 "checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
 "checksum textwrap 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "307686869c93e71f94da64286f9a9524c0f308a9e1c87a583de8e9c9039ad3f6"
diff --git a/Cargo.toml b/Cargo.toml
index 1d49b97..f419530 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,5 +16,7 @@ json		= "^0.11"
 lazy_static     = "1.1"
 log             = "^0.4"
 num_cpus        = "1.0"
+slab            = "^0.4"
 tokio           = "^0.1"
 tokio-process   = "^0.2"
+