diff --git a/README.md b/README.md
index 3ffa4c12..f84d6f4e 100644
--- a/README.md
+++ b/README.md
@@ -47,9 +47,12 @@ Some dependencies do not play nicely with our MSRV, if you are running the tests
 you may need to pin as follows:
 
 ```
-cargo update -p serde --precise 1.0.156
+cargo update -p byteorder --precise 1.4.3
 ```
 
+Note this list could sometimes be not exhaustive because not enforced by CI. 
+If you have any issues check the script executed in CI: `contrib/test.sh`
+
 ## Contributing
 Contributions are generally welcome. If you intend to make larger changes please
 discuss them in an issue before PRing them to avoid duplicate work and
diff --git a/contrib/test.sh b/contrib/test.sh
index 8a006608..16d7f96f 100755
--- a/contrib/test.sh
+++ b/contrib/test.sh
@@ -9,11 +9,7 @@ rustc --version
 
 # Pin dependencies required to build with Rust 1.58
 if cargo --version | grep "1\.58"; then
-    cargo update -p serde_json --precise 1.0.99
-    cargo update -p serde --precise 1.0.156
-    cargo update -p quote --precise 1.0.30
-    cargo update -p proc-macro2 --precise 1.0.63
-    cargo update -p serde_test --precise 1.0.152
+    cargo update -p byteorder --precise 1.4.3
 fi
 
 # Format if told to
diff --git a/fuzz/fuzz.sh b/fuzz/fuzz.sh
index 5fc65ae6..3d940c02 100755
--- a/fuzz/fuzz.sh
+++ b/fuzz/fuzz.sh
@@ -18,6 +18,8 @@ fi
 cargo --version
 rustc --version
 
+cargo update -p byteorder --precise 1.4.3
+
 # Testing
 cargo install --force honggfuzz --no-default-features
 for targetFile in $targetFiles; do