diff --git a/algo/algo.go b/algo/algo.go
index 2e64618..c07986b 100644
--- a/algo/algo.go
+++ b/algo/algo.go
@@ -143,6 +143,8 @@ func DoRandomSearch(wg *sync.WaitGroup, m *sync.Mutex) {
 	// ch serves as a way to get the actual computed output.
 	ch := make(chan []stats.Stats, funcCount)
 
+	defer close(ch)
+
 	for i := range algoStats {
 		// ng y'all.
 		go RandomSearchNG(10000, 30, bench.Dimensions, bench.FuncNames[i], ch)
@@ -158,6 +160,9 @@ func DoRandomSearch(wg *sync.WaitGroup, m *sync.Mutex) {
 	pCh := make(chan report.PicList, funcCount*len(bench.Dimensions))
 	pMeanCh := make(chan report.PicList, funcCount*len(bench.Dimensions))
 
+	defer close(pCh)
+	defer close(pMeanCh)
+
 	for i := range algoStats {
 		go plotAllDims(algoStats[i], "plot", ".svg", pCh, pMeanCh)
 	}
@@ -197,6 +202,8 @@ func DoStochasticHillClimbing(wg *sync.WaitGroup, m *sync.Mutex) {
 	// ch serves as a way to get the actual computed output.
 	ch := make(chan []stats.Stats, funcCount)
 
+	defer close(ch)
+
 	for i := range algoStats {
 		// params:
 		//   maxFES, benchMinIters, neighbours int,
@@ -216,6 +223,9 @@ func DoStochasticHillClimbing(wg *sync.WaitGroup, m *sync.Mutex) {
 	pCh := make(chan report.PicList, funcCount*len(bench.Dimensions))
 	pMeanCh := make(chan report.PicList, funcCount*len(bench.Dimensions))
 
+	defer close(pCh)
+	defer close(pMeanCh)
+
 	for _, algoStat := range algoStats {
 		go plotAllDims(algoStat, "plot", ".svg", pCh, pMeanCh)
 	}