diff --git a/Cargo.lock b/Cargo.lock
index 63607743..515ab12b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -28,9 +28,9 @@ checksum = "4c7f02d4ea65f2c1853089ffd8d2787bdbc63de2f0d29dedbcf8ccdfa0ccd4cf"
 
 [[package]]
 name = "base64"
-version = "0.21.5"
+version = "0.21.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "35636a1494ede3b646cc98f74f8e62c773a38a659ebc777a2cf26b9b74171df9"
+checksum = "c79fed4cdb43e993fcdadc7e58a09fd0e3e649c4436fa11da71c9f1f3ee7feb9"
 
 [[package]]
 name = "base64ct"
diff --git a/contracts/okp4-cognitarium/Cargo.toml b/contracts/okp4-cognitarium/Cargo.toml
index 98c4449b..f0e19ea8 100644
--- a/contracts/okp4-cognitarium/Cargo.toml
+++ b/contracts/okp4-cognitarium/Cargo.toml
@@ -45,7 +45,7 @@ serde.workspace = true
 thiserror.workspace = true
 
 [dev-dependencies]
-base64 = "0.21.5"
+base64 = "0.21.6"
 cw-multi-test.workspace = true
 
 [features]
diff --git a/contracts/okp4-objectarium/Cargo.toml b/contracts/okp4-objectarium/Cargo.toml
index 7743f02c..9b511aea 100644
--- a/contracts/okp4-objectarium/Cargo.toml
+++ b/contracts/okp4-objectarium/Cargo.toml
@@ -47,7 +47,7 @@ snap = "1"
 thiserror.workspace = true
 
 [dev-dependencies]
-base64 = "0.21.5"
+base64 = "0.21.6"
 cw-multi-test.workspace = true
 
 [features]