diff --git a/src/utils/circular_vector.hpp b/src/utils/circular_vector.hpp
index 55d3f29..ba185ec 100644
--- a/src/utils/circular_vector.hpp
+++ b/src/utils/circular_vector.hpp
@@ -4,7 +4,7 @@
 class CircularVector
 {
   public:
-    CircularVector(size_t maxSizeIn) : maxSize(maxSizeIn)
+    explicit CircularVector(size_t maxSizeIn) : maxSize(maxSizeIn)
     {}
 
     template <class... Args>
diff --git a/src/utils/labeled_tuple.hpp b/src/utils/labeled_tuple.hpp
index 55789e9..71bf4b0 100644
--- a/src/utils/labeled_tuple.hpp
+++ b/src/utils/labeled_tuple.hpp
@@ -61,7 +61,7 @@
     LabeledTuple(const LabeledTuple&) = default;
     LabeledTuple(LabeledTuple&&) = default;
 
-    LabeledTuple(tuple_type v) : value(std::move(v))
+    explicit LabeledTuple(tuple_type v) : value(std::move(v))
     {}
     LabeledTuple(Args... args) : value(std::move(args)...)
     {}