diff --git a/slack-connector/Cargo.lock b/slack-connector/Cargo.lock
index 50061076..84173ee1 100644
--- a/slack-connector/Cargo.lock
+++ b/slack-connector/Cargo.lock
@@ -634,9 +634,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.87"
+version = "0.2.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "265d751d31d6780a3f956bb5b8022feba2d94eeee5a84ba64f4212eedca42213"
+checksum = "ba4aede83fc3617411dc6993bc8c70919750c1c257c6ca6a502aed6e0e2394ae"
 
 [[package]]
 name = "libflate"