diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index 4bc5e49..155c3d6 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "nanopub-cli"
-version = "0.0.12"
+version = "0.0.13"
 description = """
 A cross-platform CLI tool written in Rust to sign Nanopublications.
 """
@@ -14,7 +14,7 @@ homepage.workspace = true
 categories.workspace = true
 
 [dependencies]
-nanopub = { version = "0.0.12", path = "../lib" }
+nanopub = { version = "0.0.13", path = "../lib" }
 clap = { version = "4.4", features = ["derive"] }
 clap_complete = "4.4"
 tokio = { version = "1.34", features = ["macros", "rt-multi-thread"] }
diff --git a/js/Cargo.toml b/js/Cargo.toml
index 1a7e24a..304dd33 100644
--- a/js/Cargo.toml
+++ b/js/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "nanopub-js"
-version = "0.0.12"
+version = "0.0.13"
 description = "JavaScript bindings for the Nanopub rust toolkit"
 repository = "https://github.com/vemonet/nanopub-rs/tree/main/js"
 authors.workspace = true
@@ -15,7 +15,7 @@ categories.workspace = true
 crate-type = ["cdylib"]
 
 [dependencies]
-nanopub = { version = "0.0.12", path = "../lib" }
+nanopub = { version = "0.0.13", path = "../lib" }
 wasm-bindgen = "0.2"
 wasm-bindgen-futures = "0.4"
 serde-wasm-bindgen = "0.6"
diff --git a/lib/Cargo.toml b/lib/Cargo.toml
index d2550a9..6fb8b5a 100644
--- a/lib/Cargo.toml
+++ b/lib/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "nanopub"
-version = "0.0.12"
+version = "0.0.13"
 description = """
 A cross-platform Rust library to sign Nanopublications, with bindings to Python and JS (wasm)
 """
diff --git a/lib/src/constants.rs b/lib/src/constants.rs
index fbdddb6..d7c0866 100644
--- a/lib/src/constants.rs
+++ b/lib/src/constants.rs
@@ -1,12 +1,12 @@
 /// List of available Nanopub servers
 /// Checkout the live list at https://monitor.petapico.org
 pub const LIST_SERVERS: [&str; 6] = [
-    "http://server.nanopubs.lod.labs.vu.nl/",
-    "http://server.np.dumontierlab.com/",
-    "http://app.tkuhn.eculture.labs.vu.nl/nanopub-server-1",
-    "http://app.tkuhn.eculture.labs.vu.nl/nanopub-server-2",
-    "http://app.tkuhn.eculture.labs.vu.nl/nanopub-server-3",
-    "http://app.tkuhn.eculture.labs.vu.nl/nanopub-server-4",
+    "https://server.nanopubs.lod.labs.vu.nl/",
+    "https://server.np.dumontierlab.com/",
+    "https://app.tkuhn.eculture.labs.vu.nl/nanopub-server-1",
+    "https://app.tkuhn.eculture.labs.vu.nl/nanopub-server-2",
+    "https://app.tkuhn.eculture.labs.vu.nl/nanopub-server-3",
+    "https://app.tkuhn.eculture.labs.vu.nl/nanopub-server-4",
 ];
 
 /// Nanopub test server URL
diff --git a/python/Cargo.toml b/python/Cargo.toml
index a15b5fc..27191dc 100644
--- a/python/Cargo.toml
+++ b/python/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "nanopub-sign"
-version = "0.0.12"
+version = "0.0.13"
 description = "Python bindings for the Nanopub rust toolkit"
 repository = "https://github.com/vemonet/nanopub-rs/tree/main/python"
 authors.workspace = true
@@ -16,7 +16,7 @@ name = "nanopub_sign"
 crate-type = ["cdylib"]
 
 [dependencies]
-nanopub = { version = "0.0.12", path = "../lib" }
+nanopub = { version = "0.0.13", path = "../lib" }
 pyo3 = { version = "0.20", features = ["extension-module"] }
 pyo3-asyncio = "0.20"
 tokio = { version = "1.34", features = ["rt-multi-thread"] }