diff --git a/src/session.rs b/src/session.rs
index ac6e9f9..23c3a15 100644
--- a/src/session.rs
+++ b/src/session.rs
@@ -65,7 +65,6 @@ impl Session<'_> {
         where
             F: Fn(&str) -> bool + RefUnwindSafe,
         {
-            use std::ffi::CStr;
             use std::str;
 
             let boxed_filter: *mut F = p_arg as *mut F;
@@ -648,7 +647,6 @@ where
     F: Fn(&str) -> bool + Send + RefUnwindSafe + 'static,
     C: Fn(ConflictType, ChangesetItem) -> ConflictAction + Send + RefUnwindSafe + 'static,
 {
-    use std::ffi::CStr;
     use std::str;
 
     let tuple: *mut (Option<F>, C) = p_ctx as *mut (Option<F>, C);
diff --git a/src/vtab/mod.rs b/src/vtab/mod.rs
index 4832434..11a83ab 100644
--- a/src/vtab/mod.rs
+++ b/src/vtab/mod.rs
@@ -645,7 +645,6 @@ where
 {
     use std::error::Error as StdError;
     use std::ffi::CStr;
-    use std::slice;
 
     let mut conn = VTabConnection(db);
     let aux = aux as *mut T::Aux;
@@ -699,7 +698,6 @@ where
 {
     use std::error::Error as StdError;
     use std::ffi::CStr;
-    use std::slice;
 
     let mut conn = VTabConnection(db);
     let aux = aux as *mut T::Aux;
@@ -852,7 +850,6 @@ where
     C: VTabCursor,
 {
     use std::ffi::CStr;
-    use std::slice;
     use std::str;
     let idx_name = if idx_str.is_null() {
         None