diff --git a/meson.build b/meson.build
index 922b2b8..93fc895 100644
--- a/meson.build
+++ b/meson.build
@@ -51,7 +51,6 @@ if get_option('pkg_config')
         description: 'Composition module for SERiF and related projects',
         version: meson.project_version(),
         libraries: [libcomposition],
-        subdirs: ['fourdst'],
         filebase: 'fourdst_composition',
         install_dir: join_paths(get_option('libdir'), 'pkgconfig')
     )
diff --git a/src/composition/meson.build b/src/composition/meson.build
index 4741ef4..ca7836a 100644
--- a/src/composition/meson.build
+++ b/src/composition/meson.build
@@ -90,6 +90,12 @@ composition_exception_headers = files(
 )
 install_headers(composition_exception_headers, subdir : 'fourdst/composition/exceptions')
 
+composition_iterator_headers = files(
+    'include/fourdst/composition/iterators/composition_abstract_iterator.h',
+)
+
+install_headers(composition_iterator_headers, subdir : 'fourdst/composition/iterators')
+
 v = meson.project_version()
 
 conf_data = configuration_data()
diff --git a/subprojects/libconfig.wrap b/subprojects/libconfig.wrap
index ba46330..90fd85d 100644
--- a/subprojects/libconfig.wrap
+++ b/subprojects/libconfig.wrap
@@ -1,6 +1,6 @@
 [wrap-git]
 url = https://github.com/4D-STAR/libconfig.git
-revision = v2.0.2
+revision = v2.2.6
 depth = 1
 
 [provide]
diff --git a/subprojects/libconstants.wrap b/subprojects/libconstants.wrap
index bdf9f60..a0acb4e 100644
--- a/subprojects/libconstants.wrap
+++ b/subprojects/libconstants.wrap
@@ -1,6 +1,6 @@
 [wrap-git]
 url = https://github.com/4D-STAR/libconstants.git
-revision = v1.1.1
+revision = v1.1.2
 depth = 1
 
 [provide]
diff --git a/subprojects/liblogging.wrap b/subprojects/liblogging.wrap
index 48bea5a..33a7d1f 100644
--- a/subprojects/liblogging.wrap
+++ b/subprojects/liblogging.wrap
@@ -1,6 +1,6 @@
 [wrap-git]
 url = https://github.com/4D-STAR/liblogging.git
-revision = v1.1.1
+revision = v1.1.2
 depth = 1
 
 [provide]
diff --git a/tests/composition/compositionTest.cpp b/tests/composition/compositionTest.cpp
index 693f58d..5226a88 100644
--- a/tests/composition/compositionTest.cpp
+++ b/tests/composition/compositionTest.cpp
@@ -511,8 +511,8 @@ TEST_F(compositionTest, standardSolarCompositions) {
             std::string string_comp = io::SolarCompositions_to_string_map.at(comp);
             std::string string_iso = io::IsotopicPercentages_to_string_map.at(iso);
 
-            EXPECT_NO_THROW(get_composition_record(comp, iso, 0.02, 0.28));
-            EXPECT_NO_THROW(get_composition_record(string_comp, string_iso, 0.02, 0.28));
+            EXPECT_NO_THROW((void)get_composition_record(comp, iso, 0.02, 0.28));
+            EXPECT_NO_THROW((void)get_composition_record(string_comp, string_iso, 0.02, 0.28));
         }
     }