diff --git a/.travis.yml b/.travis.yml
index 3bfa454..b321d45 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,15 +5,12 @@ script:
 - bash -ex .travis-opam.sh
 env:
   global:
-    - PINS="logs-async.dev:https://github.com/vbmithr/logs-async.git async-uri.dev:https://github.com/vbmithr/async-uri.git monocypher.dev:https://github.com/vbmithr/ocaml-monocypher.git fixtypes.dev:. fix.dev:. fix-ftx.dev:. fix-async.dev:. fix-coinbasepro.dev:. fix-deribit.dev:. fixmsg.dev:."
+    - PINS="logs-async.dev async-uri.dev fixtypes.dev:. fix.dev:. fix-async.dev:. fix-ftx.dev:. fix-coinbasepro.dev:. fix-deribit.dev:. fixmsg.dev:."
+
   matrix:
-    - OCAML_VERSION="4.08" PACKAGE="fix"
     - OCAML_VERSION="4.09" PACKAGE="fix"
-    - OCAML_VERSION="4.08" PACKAGE="fixtypes"
     - OCAML_VERSION="4.09" PACKAGE="fixtypes"
-    - OCAML_VERSION="4.08" PACKAGE="fix-async"
     - OCAML_VERSION="4.09" PACKAGE="fix-async"
-    - OCAML_VERSION="4.08" PACKAGE="fixmsg"
     - OCAML_VERSION="4.09" PACKAGE="fixmsg"
 os:
 - linux
diff --git a/fix-async.opam b/fix-async.opam
index 7509415..e3f5105 100644
--- a/fix-async.opam
+++ b/fix-async.opam
@@ -12,14 +12,19 @@ depends: [
   "ptime" {>= "0.8.5"}
   "uri-sexp" {>= "3.1.0"}
   "logs" {>= "0.7.0"}
-  "fix" {= version}
-  "async-uri" {= version}
-  "logs-async" {= version}
+  "fix"
+  "async-uri" {>= "0.1"}
+  "logs-async" {>= "1.1"}
   "core" {>= "v0.12.0"}
   "async" {>= "v0.12.0"}
   "angstrom-async" {>= "0.12.1"}
   "faraday-async" {>= "0.7.0"}
 ]
+pin-depends: [
+  ["fix.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+  ["async-uri.dev" "git+https://github.com/vbmithr/async-uri.git"]
+  ["logs-async.dev" "git+https://github.com/vbmithr/logs-async.git"]
+]
 synopsis: "FIX protocol: Async library to communicate to a server"
 description:"""The Financial Information eXchange (FIX) protocol is
 an electronic communications protocol initiated in 1992 for
diff --git a/fix-coinbasepro.opam b/fix-coinbasepro.opam
index 7d5b45c..14a48cf 100644
--- a/fix-coinbasepro.opam
+++ b/fix-coinbasepro.opam
@@ -8,19 +8,24 @@ doc: "https://vbmithr.github.io/ocaml-fix/doc"
 build: [ "dune" "build" "-j" jobs "-p" name ]
 run-test: [ "dune" "runtest" "-j" jobs "-p" name ]
 depends: [
+  "ocaml" {>= "4.08.0"}
   "dune" {>= "1.11.4"}
   "ppx_deriving" {>= "4.4"}
   "ppx_deriving_yojson" {>= "3.5.1"}
   "rresult" {>= "0.6.0"}
   "ppx_deriving" {>= "4.4"}
   "uuidm" {>= "0.9.7"}
-  "fixtypes" {= version}
-  "fix" {= version}
+  "fixtypes"
+  "fix"
   "base64" {>= "3.2.0"}
   "digestif" {>= "0.8.0"}
   "sexplib" {>= "v0.12.0"}
   "uri" {>= "3.1.0"}
 ]
+pin-depends: [
+  ["fixtypes.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+  ["fix.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+]
 synopsis: "FIX library"
 description: """
 """
diff --git a/fix-deribit.opam b/fix-deribit.opam
index 5ad0551..3618320 100644
--- a/fix-deribit.opam
+++ b/fix-deribit.opam
@@ -8,10 +8,11 @@ doc: "https://vbmithr.github.io/ocaml-fix/doc"
 build: [ "dune" "build" "-j" jobs "-p" name ]
 run-test: [ "dune" "runtest" "-j" jobs "-p" name ]
 depends: [
+  "ocaml" {>= "4.08.0"}
   "dune" {>= "1.11.4"}
   "ppx_deriving_yojson" {>= "3.5.1"}
-  "fixtypes" {= version}
-  "fix" {= version}
+  "fixtypes"
+  "fix"
   "rresult" {>= "0.6.0"}
   "ptime" {>= "0.8.5"}
   "base64" {>= "3.2.0"}
@@ -19,6 +20,10 @@ depends: [
   "digestif" {>= "0.8.0"}
   "uri" {>= "3.1.0"}
 ]
+pin-depends: [
+  ["fixtypes.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+  ["fix.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+]
 synopsis: "FIX library"
 description: """
 """
diff --git a/fix-ftx.opam b/fix-ftx.opam
index 40115a4..52591af 100644
--- a/fix-ftx.opam
+++ b/fix-ftx.opam
@@ -8,14 +8,19 @@ doc: "https://vbmithr.github.io/ocaml-fix/doc"
 build: [ "dune" "build" "-j" jobs "-p" name ]
 run-test: [ "dune" "runtest" "-j" jobs "-p" name ]
 depends: [
+  "ocaml" {>= "4.08.0"}
   "dune" {>= "1.11.4"}
   "uuidm" {>= "0.9.7"}
-  "fixtypes" {= version}
-  "fix" {= version}
+  "fixtypes"
+  "fix"
   "hex" {>= "1.4.0"}
   "digestif" {>= "0.8.0"}
   "uri" {>= "3.1.0"}
 ]
+pin-depends: [
+  ["fixtypes.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+  ["fix.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+]
 synopsis: "FIX library"
 description: """
 """
diff --git a/fix.opam b/fix.opam
index 51e3f33..ef9ca94 100644
--- a/fix.opam
+++ b/fix.opam
@@ -8,16 +8,20 @@ doc: "https://vbmithr.github.io/ocaml-fix/doc"
 build: [ "dune" "build" "-j" jobs "-p" name ]
 run-test: [ "dune" "runtest" "-j" jobs "-p" name ]
 depends: [
+  "ocaml" {>= "4.08.0"}
   "dune" {>= "1.11.4"}
   "ppx_deriving_yojson" {>= "3.5.1"}
-  "fixtypes" {= version}
+  "fixtypes"
   "rresult" {>= "0.6.0"}
   "astring" {>= "0.8.3"}
   "ptime" {>= "0.8.5"}
-  "sexplib" {>= "v0.12.0"}
+  "sexplib" {>= "v0.13.0"}
   "angstrom" {>= "0.12.1"}
   "faraday" {>= "0.7.0"}
 ]
+pin-depends: [
+  ["fixtypes.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+]
 synopsis: "FIX protocol: library to create FIX fields and messages"
 description:"""The Financial Information eXchange (FIX) protocol is
 an electronic communications protocol initiated in 1992 for
diff --git a/fixmsg.opam b/fixmsg.opam
index b0671e4..96284a5 100644
--- a/fixmsg.opam
+++ b/fixmsg.opam
@@ -12,12 +12,20 @@ depends: [
   "ptime" {>= "0.8.5"}
   "ppx_deriving_yojson" {>= "3.5.1"}
   "sexplib" {>= "v0.12.0"}
-  "fixtypes" {= version}
-  "fix" {= version}
-  "fix-async" {= version}
-  "fix-deribit" {= version}
-  "fix-coinbasepro" {= version}
-  "fix-ftx" {= version}
+  "fixtypes"
+  "fix"
+  "fix-async"
+  "fix-deribit"
+  "fix-coinbasepro"
+  "fix-ftx"
+]
+pin-depends: [
+  ["fixtypes.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+  ["fix.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+  ["fix-async.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+  ["fix-deribit.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+  ["fix-coinbasepro.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
+  ["fix-ftx.dev" "git+https://github.com/vbmithr/ocaml-fix.git"]
 ]
 synopsis: "FIX protocol: high level types and messages"
 description:"""The Financial Information eXchange (FIX) protocol is
diff --git a/fixtypes.opam b/fixtypes.opam
index 5299fe8..423201c 100644
--- a/fixtypes.opam
+++ b/fixtypes.opam
@@ -8,14 +8,15 @@ doc: "https://vbmithr.github.io/ocaml-fix/doc"
 build: [ "dune" "build" "-j" jobs "-p" name ]
 run-test: [ "dune" "runtest" "-j" jobs "-p" name ]
 depends: [
+  "ocaml" {>= "4.08.0"}
   "dune" {>= "1.11.4"}
   "ppx_deriving" {>= "4.4"}
   "ppx_deriving_yojson" {>= "3.5.1"}
   "ocplib-json-typed" {>= "0.7.1"}
   "fmt" {>= "0.8.8"}
   "uuidm" {>= "0.9.7"}
-  "bin_prot" {>= "v0.12.0"}
-  "ppx_bin_prot" {>= "v0.12.0"}
+  "bin_prot" {>= "v0.13.0"}
+  "ppx_bin_prot" {>= "v0.13.0"}
   "rresult" {>= "0.6.0"}
   "astring" {>= "0.8.3"}
   "ptime" {>= "0.8.5"}
diff --git a/src/dune b/src/dune
index 05020da..9dcd928 100644
--- a/src/dune
+++ b/src/dune
@@ -51,7 +51,7 @@
  (name fix_deribit)
  (public_name fix-deribit)
  (modules fix_deribit)
- (preprocess (pps ppx_sexp_conv ppx_deriving_yojson ppx_bin_prot))
+ (preprocess (pps ppx_sexp_conv ppx_deriving_yojson))
  (libraries
    ppx_deriving_yojson
    fixtypes