diff --git a/DESCRIPTION b/DESCRIPTION
index 63348fd..f16c679 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -18,8 +18,8 @@ Authors@R: c(
     ))
 Description: Functions to query (filter or transform), pivot (convert
     from array-of-objects to object-of-arrays, for easy import as 'R'
-    data frame), search, patch (edit), and validate (against 'JSON
-    Schema') 'JSON' and 'NDJSON' strings, files, or URLs. Query and
+    data frame), search, patch (edit), and validate (against 'JSON Schema')
+    'JSON' and 'NDJSON' strings, files, or URLs. Query and
     pivot support 'JSONpointer', 'JSONpath' or 'JMESpath'
     expressions. The implementation uses the 'jsoncons'
     <https://danielaparker.github.io/jsoncons/> header-only library;
diff --git a/src/readbinbuf.h b/src/readbinbuf.h
index 74e0ec8..c678a47 100644
--- a/src/readbinbuf.h
+++ b/src/readbinbuf.h
@@ -25,7 +25,7 @@ class readbinbuf : public std::streambuf {
         buf_ = new char[n_bytes_];
     }
 
-    ~readbinbuf() { delete buf_; }
+    ~readbinbuf() { delete[] buf_; }
 
     int underflow() {
         if (gptr() == egptr()) {
diff --git a/src/rquerypivot.h b/src/rquerypivot.h
index c44a8ae..d0e28ff 100644
--- a/src/rquerypivot.h
+++ b/src/rquerypivot.h
@@ -188,7 +188,7 @@ class rquerypivot
                 // construct array of n_j 'null' to pad each key
                 Json pad(json_array_arg);
                 pad.reserve(n_j);
-                for (int i = 0; i < n_j; ++i)
+                for (std::size_t i = 0; i < n_j; ++i)
                     pad.push_back(Json::null());
                 for (auto& r_key : r_keys) {
                     result_[0][r_key].insert(
@@ -202,7 +202,7 @@ class rquerypivot
                 // construct array of n_r 'null' to pad each key
                 Json pad(json_array_arg);
                 pad.reserve(n_r);
-                for (int i = 0; i < n_r; ++i)
+                for (std::size_t i = 0; i < n_r; ++i)
                     pad.push_back(Json::null());
                 for (auto& j_key : j_keys) {
                     result_[0][j_key] = pad;