diff --git a/Cargo.lock b/Cargo.lock
index acf37857..8bcaa83a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -52,9 +52,9 @@ checksum = "4c7f02d4ea65f2c1853089ffd8d2787bdbc63de2f0d29dedbcf8ccdfa0ccd4cf"
 
 [[package]]
 name = "base64ct"
-version = "1.6.0"
+version = "1.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c3c1a368f70d6cf7302d78f8f7093da241fb8e8807c05cc9e51a125895a6d5b"
+checksum = "89e25b6adfb930f02d1981565a6e5d9c547ac15a96606256d3b59040e5cd4ca3"
 
 [[package]]
 name = "bitflags"
diff --git a/password-hash/Cargo.toml b/password-hash/Cargo.toml
index 8e6ba281..99a51eca 100644
--- a/password-hash/Cargo.toml
+++ b/password-hash/Cargo.toml
@@ -17,7 +17,7 @@ as well as a `no_std`-friendly implementation of the PHC string format
 """
 
 [dependencies]
-base64ct = "1.6"
+base64ct = "1.7"
 subtle = { version = "2", default-features = false }
 
 # optional dependencies
diff --git a/password-hash/src/errors.rs b/password-hash/src/errors.rs
index ff5b0984..14b5d9ea 100644
--- a/password-hash/src/errors.rs
+++ b/password-hash/src/errors.rs
@@ -106,8 +106,7 @@ impl fmt::Display for Error {
 impl core::error::Error for Error {
     fn source(&self) -> Option<&(dyn core::error::Error + 'static)> {
         match self {
-            // TODO: restore after base64ct will migrate to core::error::Error
-            // Self::B64Encoding(err) => Some(err),
+            Self::B64Encoding(err) => Some(err),
             Self::ParamValueInvalid(err) => Some(err),
             Self::SaltInvalid(err) => Some(err),
             _ => None,