diff --git a/lib/entry/libimagentrylink/Cargo.toml b/lib/entry/libimagentrylink/Cargo.toml
index c52d0c26..3b0029ef 100644
--- a/lib/entry/libimagentrylink/Cargo.toml
+++ b/lib/entry/libimagentrylink/Cargo.toml
@@ -24,7 +24,8 @@ itertools = "0.7"
 log = "0.4.0"
 toml = "0.4"
 url = "1.5"
-rust-crypto = "0.2"
+sha-1 = "0.7"
+hex = "0.3"
 is-match = "0.1"
 toml-query = "0.6"
 error-chain = "0.11"
diff --git a/lib/entry/libimagentrylink/src/external.rs b/lib/entry/libimagentrylink/src/external.rs
index 77a81849..b2b898ba 100644
--- a/lib/entry/libimagentrylink/src/external.rs
+++ b/lib/entry/libimagentrylink/src/external.rs
@@ -54,8 +54,8 @@ use self::iter::*;
 
 use toml::Value;
 use url::Url;
-use crypto::sha1::Sha1;
-use crypto::digest::Digest;
+use sha1::{Sha1, Digest};
+use hex;
 
 pub trait Link {
 
@@ -318,11 +318,7 @@ impl ExternalLinker for Entry {
 
         debug!("Iterating {} links = {:?}", links.len(), links);
         for link in links { // for all links
-            let hash = {
-                let mut s = Sha1::new();
-                s.input_str(&link.as_str()[..]);
-                s.result_str()
-            };
+            let hash = hex::encode(Sha1::digest(&link.as_str().as_bytes()));
             let file_id =
                 ModuleEntryPath::new(format!("external/{}", hash)).into_storeid()
                     .map_dbg_err(|_| {
diff --git a/lib/entry/libimagentrylink/src/lib.rs b/lib/entry/libimagentrylink/src/lib.rs
index 788f8b39..366d53fe 100644
--- a/lib/entry/libimagentrylink/src/lib.rs
+++ b/lib/entry/libimagentrylink/src/lib.rs
@@ -40,7 +40,8 @@ extern crate itertools;
 extern crate toml;
 extern crate toml_query;
 extern crate url;
-extern crate crypto;
+extern crate sha1;
+extern crate hex;
 #[macro_use] extern crate is_match;
 #[macro_use] extern crate error_chain;
 
diff --git a/lib/entry/libimagentryref/Cargo.toml b/lib/entry/libimagentryref/Cargo.toml
index 97ea47e9..a23c13da 100644
--- a/lib/entry/libimagentryref/Cargo.toml
+++ b/lib/entry/libimagentryref/Cargo.toml
@@ -25,22 +25,22 @@ log = "0.4.0"
 toml = "0.4"
 toml-query = "0.6"
 error-chain = "0.11"
+sha-1 = { version = "0.7", optional = true }
+sha2 = { version = "0.7", optional = true }
+sha3 = { version = "0.7", optional = true }
+hex = { version = "0.3", optional = true }
 
 libimagstore     = { version = "0.9.0", path = "../../../lib/core/libimagstore" }
 libimagerror     = { version = "0.9.0", path = "../../../lib/core/libimagerror" }
 libimagentryutil = { version = "0.9.0", path = "../../../lib/entry/libimagentryutil" }
 
-[dependencies.rust-crypto]
-version = "0.2"
-optional = true
-
 [features]
 default             = []
 generators          = []
-generators-sha1     = ["rust-crypto"]
-generators-sha224   = ["rust-crypto"]
-generators-sha256   = ["rust-crypto"]
-generators-sha384   = ["rust-crypto"]
-generators-sha512   = ["rust-crypto"]
-generators-sha3     = ["rust-crypto"]
+generators-sha1     = ["sha-1", "hex"]
+generators-sha224   = ["sha2", "hex"]
+generators-sha256   = ["sha2", "hex"]
+generators-sha384   = ["sha2", "hex"]
+generators-sha512   = ["sha2", "hex"]
+generators-sha3     = ["sha3", "hex"]
 
diff --git a/lib/entry/libimagentryref/src/generators/mod.rs b/lib/entry/libimagentryref/src/generators/mod.rs
index 204ae081..23f12f51 100644
--- a/lib/entry/libimagentryref/src/generators/mod.rs
+++ b/lib/entry/libimagentryref/src/generators/mod.rs
@@ -175,7 +175,7 @@ macro_rules! make_sha_mod {
 
             use error::RefError as RE;
 
-            use crypto::digest::Digest;
+            use hex;
             make_unique_ref_path_generator! (
                 pub $hashname
                 over generators::base::Base
@@ -235,59 +235,53 @@ macro_rules! make_sha_mod {
 #[cfg(feature = "generators-sha1")]
 make_sha_mod! {
     sha1, Sha1, |buffer: String| {
-        let mut hasher = ::crypto::sha1::Sha1::new();
+        use sha1::{Sha1, Digest};
 
         trace!("Hashing: '{:?}'", buffer);
-        hasher.input_str(&buffer);
-        let res = hasher.result_str();
+        let res = hex::encode(Sha1::digest(buffer.as_bytes()));
         trace!("Hash => '{:?}'", res);
 
-        Ok(String::from(res))
+        Ok(res)
     }
 }
 
 #[cfg(feature = "generators-sha224")]
 make_sha_mod! {
     sha224, Sha224, |buffer: String| {
-        let mut hasher = ::crypto::sha2::Sha224::new();
-        hasher.input_str(&buffer);
-        Ok(String::from(hasher.result_str()))
+        use sha2::{Sha224, Digest};
+        Ok(hex::encode(Sha224::digest(buffer.as_bytes())))
     }
 }
 
 #[cfg(feature = "generators-sha256")]
 make_sha_mod! {
     sha256, Sha256, |buffer: String| {
-        let mut hasher = ::crypto::sha2::Sha256::new();
-        hasher.input_str(&buffer);
-        Ok(String::from(hasher.result_str()))
+        use sha2::{Sha256, Digest};
+        Ok(hex::encode(Sha256::digest(buffer.as_bytes())))
     }
 }
 
 #[cfg(feature = "generators-sha384")]
 make_sha_mod! {
     sha384, Sha384, |buffer: String| {
-        let mut hasher = ::crypto::sha2::Sha384::new();
-        hasher.input_str(&buffer);
-        Ok(String::from(hasher.result_str()))
+        use sha2::{Sha384, Digest};
+        Ok(hex::encode(Sha384::digest(buffer.as_bytes())))
     }
 }
 
 #[cfg(feature = "generators-sha512")]
 make_sha_mod! {
     sha512, Sha512, |buffer: String| {
-        let mut hasher = ::crypto::sha2::Sha512::new();
-        hasher.input_str(&buffer);
-        Ok(String::from(hasher.result_str()))
+        use sha2::{Sha512, Digest};
+        Ok(hex::encode(Sha512::digest(buffer.as_bytes())))
     }
 }
 
 #[cfg(feature = "generators-sha3")]
 make_sha_mod! {
     sha3, Sha3, |buffer: String| {
-        let mut hasher = ::crypto::sha3::Sha3::sha3_256();
-        hasher.input_str(&buffer);
-        Ok(String::from(hasher.result_str()))
+        use sha3::{Sha3_256, Digest};
+        Ok(hex::encode(Sha3_256::digest(buffer.as_bytes())))
     }
 }
 
diff --git a/lib/entry/libimagentryref/src/lib.rs b/lib/entry/libimagentryref/src/lib.rs
index a9656d92..d22c04a7 100644
--- a/lib/entry/libimagentryref/src/lib.rs
+++ b/lib/entry/libimagentryref/src/lib.rs
@@ -51,6 +51,20 @@ pub mod error;
 pub mod reference;
 pub mod refstore;
 
+#[cfg(feature  = "generators-sha1")]
+extern crate sha1;
+
+#[cfg(any(
+    feature = "generators-sha224",
+    feature = "generators-sha256",
+    feature = "generators-sha384",
+    feature = "generators-sha512",
+))]
+extern crate sha2;
+
+#[cfg(feature  = "generators-sha3")]
+extern crate sha3;
+
 #[cfg(any(
     feature = "generators-sha1",
     feature = "generators-sha224",
@@ -59,7 +73,7 @@ pub mod refstore;
     feature = "generators-sha512",
     feature = "generators-sha3",
 ))]
-extern crate crypto;
+extern crate hex;
 
 #[cfg(feature = "generators")]
 pub mod generators;