diff --git a/Cargo.lock b/Cargo.lock
index cbde54f..c640a6d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -238,7 +238,7 @@ dependencies = [
 
 [[package]]
 name = "gibcite"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "assert_cmd",
  "assert_fs",
@@ -250,6 +250,7 @@ dependencies = [
  "rusqlite",
  "serde",
  "serde_json",
+ "tempfile",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 345f669..e94cd9b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,13 +1,12 @@
 [package]
 name = "gibcite"
-version = "0.3.0"
+version = "0.3.1"
 edition = "2021"
 authors = ["Marek S. Łukasiewicz <marek@lukasiewicz.tech>"]
 description = "Give details of citation from local Zotero database"
 readme = "README.md"
 repository = "https://github.com/Maarrk/gibcite"
 license = "AGPL-3.0-or-later"
-license-file = "LICENSE.txt"
 keywords = ["bibliography", "zotero"]
 categories = ["command-line-utilities"]
 
@@ -21,6 +20,7 @@ regex = "1"
 rusqlite = { version = "0.27.0", features = ["backup", "bundled"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
+tempfile = "3"
 
 [dev-dependencies]
 assert_cmd = "2.0"
diff --git a/src/lib.rs b/src/lib.rs
index cfe1893..7e2589d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -3,11 +3,15 @@ use regex::Regex;
 use rusqlite::Connection;
 use serde::Deserialize;
 use serde_json::Value;
-use std::{error::Error, path::PathBuf};
+use std::{error::Error, fs::copy, path::PathBuf};
+use tempfile::{tempdir, TempDir};
 
 pub mod output;
 
-pub fn get_database_path(input: &Option<PathBuf>) -> Result<Box<PathBuf>, String> {
+/// Copies the SQLite database files into a temporary directory
+///
+/// This allows to read them while they are locked by Zotero
+pub fn get_database_path(input: &Option<PathBuf>) -> Result<TempDir, String> {
     let path_buf = match input {
         Some(path) => path.to_owned(),
         None => {
@@ -32,7 +36,23 @@ pub fn get_database_path(input: &Option<PathBuf>) -> Result<Box<PathBuf>, String
         ));
     }
 
-    Ok(Box::new(path_buf))
+    if let Ok(dir) = tempdir() {
+        if let Err(err) = copy(
+            path_buf.join("zotero.sqlite"),
+            dir.path().join("zotero.sqlite"),
+        ) {
+            return Err(format!("copy error: {:?}", err));
+        }
+        if let Err(err) = copy(
+            path_buf.join("better-bibtex.sqlite"),
+            dir.path().join("better-bibtex.sqlite"),
+        ) {
+            return Err(format!("copy error: {:?}", err));
+        }
+        Ok(dir)
+    } else {
+        Err("could not open temporary dir".into())
+    }
 }
 
 pub fn count_items(conn: &Connection) -> Result<usize, Box<dyn Error>> {
diff --git a/src/main.rs b/src/main.rs
index f5ecb81..eb5926b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -35,7 +35,7 @@ fn main() {
     }
 
     let conn = Connection::open_with_flags(
-        database_path.join("zotero.sqlite"),
+        database_path.path().join("zotero.sqlite"),
         OpenFlags::SQLITE_OPEN_READ_ONLY,
     )
     .unwrap_or_else(|err| {
@@ -43,7 +43,7 @@ fn main() {
         exit(exitcode::UNAVAILABLE);
     });
     let bibtex_conn = Connection::open_with_flags(
-        database_path.join("better-bibtex.sqlite"),
+        database_path.path().join("better-bibtex.sqlite"),
         OpenFlags::SQLITE_OPEN_READ_ONLY,
     )
     .unwrap_or_else(|err| {
diff --git a/tests/cli.rs b/tests/cli.rs
index 29e3103..72ba2a9 100644
--- a/tests/cli.rs
+++ b/tests/cli.rs
@@ -71,3 +71,28 @@ fn mock_key() -> Result<(), Box<dyn Error>> {
 
     Ok(())
 }
+
+#[test]
+fn missing_key() -> Result<(), Box<dyn Error>> {
+    let (mut cmd, _dir) = setup_command().unwrap();
+    cmd.arg("thisisnotacitationkey");
+
+    cmd.assert().failure();
+
+    Ok(())
+}
+
+#[test]
+fn json_output() -> Result<(), Box<dyn Error>> {
+    let (mut cmd, _dir) = setup_command().unwrap();
+    cmd.arg("kowalskiSampleTitle2022");
+
+    let output = cmd.output().unwrap().stdout;
+    let val: serde_json::Value = serde_json::from_slice(&output).unwrap();
+    let object = val[0].as_object().unwrap();
+
+    assert_eq!("A sample title", object["title"]);
+    assert_eq!("Abstract for a sample article", object["abstract"]);
+
+    Ok(())
+}